Practice Test


1) Which of the following is not an organic compound?


2) The first organic compound ever prepared in laboratory from elements is


3) Compounds having the same molecular formula but differing in their structure are called as


4) The ability of carbon atom to combine with one another to form long chains, branched chains and rings is known as


5) Fuel used in automobiles is a mixture of


6) Which of the following is not a petroleum product?


7) Common element in all the organic compounds other than hydrogen is


8) Which of the following statements is wrong?


9) Which of the following elements forms the largest number of compounds?


10) Which of the following is not the criteria for purity of a substance?


11) Sugar is obtained from its saturated solution by


12) Benzoic acid can be purified by


13) Organic liquids like acetone is purified by _____ methods.


14) Extraction of oils and fats from seeds and essence from flowers is done by using


15) To purify mixtures of organic compounds _____ method is used.


16) Sodium chloride crystals are


17) Alum crystals are


18) Copper sulphate crystals are


19) Quartz crystals are


20) The process of obtaining a solid in a pure crystalline form, from solution is known as


21) The process ______ is used to separate two or more solids which are soluble in a given solvent


22) Urea melts at _____ and acetanilide melts at 387 K.


23) The soluble solids and miscible liquids are separated by


24) Process used for the separation of compounds from the mixture of two or more miscible liquids having different boiling points is called


25) Separation of binary mixture of acetone and benzene is done by various types of


26) The purity of crystals can be checked by determining its


27) A crystalline substance is that


28) Boiling point of a liquid depends upon


29) In the detection of melting point, thermometer along with the capillary containing the substance is placed in


30) When undissolved solid is in contact with its solution, the supernatant liquid is called


31) To determine the melting point, powdered substance is filled in


32) To determine the boiling point, powdered liquid is filled in


33) The two solids of variable solubilities are separated by the process of


34) In Lassaigne method, the elements of the organic compound are fused with metallic


35) The presence of nitrogen in an organic compound is confirmed when the complex form has


36) The formation of ______ precipitate which is insoluble in ammonium hydroxide confirms the presence of iodine


37) In Lassaigne method, the treatment of sodium fusion extract with sodium niroprusside produces violet colour which indicates the presence of


38) _____ is usually detected from the chemical properties of the compound


39) ______ method is not applicable to compounds containing nitrogen in the form of nitro and azo group


40) Carius method is used for the estimation of fluorine as ______ is water soluble.


41) In the Kjeldahls method, nitrogen in the organic compound is converted to


42) 0.4 gm of an organic compound gave 0.188 g of silver bromide by halogen estimation method. The percentage of bromine in the compound is(At. Mass of Ag = 108, Br = 80)


43) In the Dumas method, for the estimation of nitrogen, 0.84 g of an organic compound gave 448 mL of nitrogen at S.T.P. The percentage of nitrogen in the compound is


44) 0.2585 g of an organic compound containing iodine was heated with excess of strong nitric acid and silver nitrate in a Carius tube. The precipitate of silver iodide was filtered, washed and dried. Its weight was found to be 0.3894 g. Calculate the percentage of iodine in the compound


45) 0.4 g of an organic compound containing phosphorus gave 0.555 g of magnesium pyrophosphate by usual analysis. Calulate the percentage of phosphorus in the compound


46) Dumas method is used for estimation of


47) ______ has a linear structure due to sp hybridization of carbon


48) Bond enthalpy and bond length in organic compounds are influenced by


49) Aromatic compounds contain atleast one aromatic ring which resembles________ in their chemical behaviour


50) The chemical properties of an organic compound are characterizes by its


51) The homologous series consist of homologues which are arranged in the increasing order of their


52) Which of the following is not a cyclic compound?


53) Which of the following names is not correct in the IUPAC system of nomenclature?


54) The compound having one isopropyl group is


55) Which one of the following is not an alcohol?


56) Which of the following compounds does not contain a C = O bond?


57) The effect in which the displacements of electrons are temporary is called


58) The phenomenon in which none of the structure describes most of the properties of the compound is termed as


59) The number of contributing resonance structure contributes to


60) In the '' no bond'' resonance structures carbon - carbon bond has _____ character


61) Isopropyl radical has ______ hyperconjugation structures.


62) The process of breaking or cleavage of covalent bond is known as


63) Homolysis also occurs in the presence of catalyst such as


64) The species in which carbon atom possesses a octet of electrons and a negative charge is called


65) Stability of carbocation increases as the number of _____ substituents bonded to positively charged carbon atom increases


66) Carbocations are______ and acts as a ______


67) Addition reaction is not shown by


68) Which of the following is an example of elimination reaction?


69) Purification of aniline and nitrobenzene can be done by ______ method


70) Monoclinic sulphur has _______ crystals


71) Copper sulphate crystal are of ______ colour


72) Non - volatile soluble Impurities can be removed from a liquid by the process of


73) The smallest ratio which shows the number of atoms of each element in a molecule of a compound is the


74) In Lassaigne method, the presence of ______ is confirmed, if the white precipitate is soluble in ammonium hydroxide


75) Homologues differ in molecular weight by


76) Identify the bond formed which is polar in nature


77) Which of the following carbocation has the least stability?


78) The free radicals resulting from the cleavage of a bond are


79) The general formula for an ether is


80) The general formula of a carboxylic acid is


81) The general formula of an ester is


82) ______ is filled in U-tube to absorb water from the organic mixture


83) Molecular formula of benzene is


84) In the Dumas method for the estimation of nitrogen, the gas collected in nitrometer is


85) An organic compound containing bromine gave the following result on analysis C = 21.96 %, H = 4.58 % and Br = 73.36 % Find the molecular formula of the compound if the vapour density is 54.5


86) An organic substance on combusion gave 53.2% carbon, 15.5% hydrogen and 31.3% nitrogen. If the molecular weight is 45. Find the molecular formula


87) The angle between the four valencies of carbon is


88) In the homologous series, the successive members differ from each other in molecular formula by


89) Which of the following is methanol?


90) Which of the following is butan - 2 -ol?


91) Which one of the following could be a cyclic alkane?


92) Identify the electron withdrawing group from the following


93) Which of the following carbocation wil be the most stable?


94) Which of the following species does not act as a nucleophile?


95) Identify the molecule which is NOT a nucleophile from the following


96) Which of the following series contains only nucleophiles?


97) Which of the following species has electron releasing (or + I inductive) effect?


98) Which of the following species is not an electrophile?


99) Which of the following is an electrophile?


100) Friedrich wohler synthesized urea by heating a mixture of


101) An organic compound containing C, H and N give the following result on analysis
C = 40%, H = 13.33% and N = 46.67% what would be the empirical formula?


102) Which is the structural formula for 3 - ethyl, 2 - methylhex - 1 -ene?


103) Which is the structural formula of 1, 2, 3 - propanetriol?


104) The name of some compounds are given, which one is not in IUPAC system?


105) Which is 1, 1- dimethylcyclohexane?


106) Which is 1, 2- dimethylcyclobutane?


107) Which of the following is hexan - 2 - ol ?


108) Which of the following is 4-methylpentan-2-ol ?


109) Which of the following is 2-methylpentan-3-ol?


110) Which of the following is 4-methylpentan-1-ol ?


111) Which of the following is a cycloalkane ?


112) Which is 1, 1-Dichlorobutane ?


113) Which structure below represents a ketone ?


114) Which structure below represents an aldehyde ?


115) Which structure below represents an ether ?


116) The general formula of an aldehyde is


117) The structure of 4 methyl - 2 - penten - 1 - ol is


118) Iso-butyl chloride is


119) 2-Methyl-2-butene will be represented as


120) Which class of compound is not reported in IUPAC nomenclature?


121) Cyclohexane is


122) The structure representing a heterocyclic compound is


123) The formula of 3-chloro-2,2dimethylbutane is


124) 3-Methylpenta-1,3-diene is


125) Which is an alternate name for methyl-n-propylmethane?


126) Which of the following is heterocyclic aromatic species?


127) Which nomenclature in IUPAC is not correct?


128) 3-penylpropenoic acid is IUPAC name of


129) Which among the following is the correct IUPAC name of isomylene?


130) The correct IUPAC name of acetonitrile is


131) neo-Heptyl alcohol is correctly represented as


132) A student named the compound as 1,4-butadiene


133) 2-Methylbut-2ene will be represented as


134) The incorrect IUPAC name is


135) IUPAC name of 3-iso-propyl-o-xylene is


136) IUPAC name of 4-iso-propyl-m-xylene is


137) Names of some compound are given. Which one is not in IUPAC system?


138) Which of the following IUPAC names is correct?


139) The structural formula of 2-methyl-2-butene is


140) vinyl carbinol is


141) The correct IUPAC name of phenetole is


142) The IUPAC name of acraldehyde is


143) The structural formula of cyclohexyl alcohol is


144) The IUPAC name of tert-butyl chloride is


145) Indicate the wrongly named compound


146) Which of the following compound has wrong IUPAC name?


147) The compound which has one iso-propyl group is


148) Ammonia molecule is


149) Heterolysis of propane gives


150) Which of the following contains only three pairs of electrons


151) Which of the following species is paramagnetic?


152) Electrophiles are


153) Homolytic and heterolytic bond dissociation eneriges are


154) In hyperconjugation, the atom involved is


155) Hyperconjugation is


156) Reaction involving heterolytic fission are said to be produce via


157) Due to its sextet (having six electrons), the carbonium ions are


158) The +I-effect (inductive effect) is shown by


159) Which of the following is singlet carbene?


160) Which one of the following compound is most acidic?


161) The -I effect is shown by


162) Which of the following is strong base?


163) Which of the following is an electrophilic reagent?


164) Shifting of electron of a multiple bond under the influence of a reagent is called


165) An alkene is most likely to react with


166) Sulphur trioxide is


167) Homolytic fission of C - C bond in ethane gives an intermediate in which carbon is ................ hybridised.


168) In carbonium ion the carbon bearing the positive charge is


169) The central C atom of a carbanion possesses


170) Chlorine in vinyl chloride is less reactive because


171) The shape of carbonium ion is


172) Which of the following is nucleophile?


173) A neutral divalent carbon intermediate produced by the removal of two attached atom is called


174) Which group has the maximum inductive effect?


175) Zero inductive effect is shown by


176) The structure of tertiary butyl carbonium ion is


177) The compound which gives the most stable carbonium ion on dehydration is


178) Which of the following statement is not correct?


179) Which one of the following does not show resonance?


180) Select the correct order of basic nature


181) Which of the following can act as an nucleophile?


182) The strongest base among the following


183) Free radical can undergo


184) The homolytic fission of a hydrocarbon results in the formation of


185) Which of the following is not a nuclephile?


186) Electrophilic reagent are


187) Which of the following statement is false about resonance contribution structures?


188) Which of the following is an electrophilic reagent?


189) Heterolytic cleavage of a covalent bond gives only


190) Which of the following is correct regarding the -I effect of the substituents?


191) Nucleophilicity order is correctly represented by


192) Which of the following is an electrophile?


193) Which of the following is an nucleophile?


194) The most reactive nucleophile among the following is


195) Which of the following is most stable?


196) Which of the following contains three pairs of electrons in the valence shell?


197) Which of the following is the most stable carbocation (carbonium ion)?


198) Which of the following is least stable?


199) In which of the following homolytic bond fission takes place?


200) Select the most stable carbocation from among the following.


201) The compound having only primary hydrogen atom is


202) Which of the following statement regarding the resonance energy of benzene is correct?


203) The most stable carbonium ion among the following is


204) Which of the following is least stable carbonium ion?


205) Which of the following behaves both as a nucleophile and as an electrophile?


206) Point out the correct statement about resonance?


207) The most stable carbanion among the following is


208) Resonance structure of a molecule does not have


209) Which of the following acids would you expect to be the strongest?


210) Among the following the most basic compound is


211) Homolytic fission of C - C bond in ethane gives an intermediate in which carbon?


212) The kind of delocalisation involving sigma bond orbitals is called


213) The most unlikely representation of resonance structure of p-nitrophenoxide ion is


214) Which of the following has the highest nucleophilicity?


215) Which is most stable?


216) The addition of HBr on 2-Butene is an example of


217) Carbanions initiate


218) Ease of abstraction of hydrogen is greater when attached to


219) Why is light necessary to bring in chlorination reaction of alkane?


220) What information is provided by reaction mechanism?


221) Which of the following alkyl halides is used as a methylating agent?


222) The reagent used in dehydrohalogenation process is


223) Which one is an elimination reaction?


224) The yield in organic reaction is generally poor because the reaction are


225) The attacking species in the aromatic sulphonation is


226) Addition of HI on double bond of propene yields iso-propyl iodide as major product. It is because the addition proceeds through


227) Among the following compound which is most reactive towards nitration


228) Dehydrogenation of ethanol to give ethanal is


229) Acetaldehyde is the rearrangement product of


230) Which of the following is an example of elimination reaction?


231) Which species represent the electrophile in aromatic nitration?


232) Which species represent the electrophile in aromatic nitration?


233) The typical reaction of olefinic bond is


234) The formation of cyanohydrin from a ketone is an example of


235) The compound which gives least stable carbocation during dehydration is


236) Which of the following is an example of nucleophile?


237) Which of the following is non aromatic?


238) The +I effect of alkyl group is in the order


239) With a change in hybridisation of the carbon bearing the charge, the stability of a carbanion increase in the order


240) Among the following, the least stable resonance structure is


241) The IUPAC name of neo-pentane is


242) 3-phenylpropenoic acid is IUPAC name of :


243) The strain in bonds of cyclopropane is :


244) Chlorine in vinyl chloride is less reactive because :


245) The alkene that exhibits geometrical isomerism is


246) Pick out the alkane which differs from the other members of the group


247) Detection of sulphur in sodium extract is done by


248) Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration which
confirm the presence of


249) Conversion of chlorobenzene to phenol involves


250) In sulphur detection of an organic compound, sodium nitroprusside solution is added to sodium extract.
Formation of violet colour is due to


251) The maximum bond energy is present


252) The number of secondary hydrogens in 2, 2-dimethyl butane is


253) Find the non-staggered form (s) of ethane :


254) With a change in hybridisation of the carbon bearing the charge, the stability of a carbanion increase in the
order


255) The addition reaction among the following is


256) The correct definition for organic chemistry is :


257) Which of the organic compounds will give red colour in Lassaigne test?


258) The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic
compound is


259) The production of an optically active compound from a symmetric molecule without resolution is called :


260) Which is wrong IUPAC name?


261) Which of the following statements is wrong?


262) Nitroethane can exhibit one of the following kind of isomerism


263) Which of the following would show configurational enantiomorphism?


264) Heterolysis of carbon-chlorine bond produces :


265) Maximum enol content is in


266) Which of the following compounds will show metamerism?


267) Which of the following is elimination reaction


268) Mixture of sugar and common salt is separated by crystallisation by dissolving in


269) The general formula for cycloalkanes is :


270) The bond that undergoes heterolytic cleavage most easily is


271) Phosphorus is estimated as


272) Species containing carbon with three bonds and an electron are called :


273) Which of the aldehyde is most reactive?


274) 3-methyl penta-1,3-diene is :


275) Which of the following compounds is optically active?


276) “The negative part of the addendum adds on the carbon atom joined to the least number of hydrogen
atoms.” This statement is called :


277) d-tartaric acid and l-tartaric acid are :


278) Which of the following is a pair of functional isomers?


279) Which of the following is an optically active compound?


280) Bond energy ……..with the increase in number of lone pairs on the bonded atoms.


281) A liquid decomposes at its normal boiling point. It can be purified by


282) On monochlorination of 2-methyl butane, the number of chiral compounds formed are :


283) Stability of which intermediate is not governed by hyperconjugation?


284) The ammonia evolved from the treatment of 0.30g of an organic compound for the estimation of nitrogen
was passed in 100mL of 0.1M sulphuric acid. The excess of acid required 20mL of 0.5 M sodium hydroxide
solution for complete neutralisation. The organic compound is


285) Number of possible isomers of glucose are :


286) The stability of 2,3-dimethyl but-2-ene is more than 2-butene. This can be explained in terms of :


287) Protin solvent is


288) Among the following compounds (I-III) the correct order of reaction with electrophilic reagand is


289) How many chiral compounds are possible on monochlorination of 2-methyl butane?


290) The epoxide ring consists of which of the following?


291) The reaction which is not the example of nucleophilic substitution among the following is


292) An important chemical method to resolve a racemic mixture makes use of the formation of :


293) Which of the following complex formation indicates presence of sulphur in the organic compound when
sodium nitroprusside is added to sodium extract of the compound?


294) Who pointed out the concept hyperconjugation?


295) Alkyl halide can be converted into alkene by


296) The optically active alkane with lowest molecular weight is :


297) Which type of isomerism is most common among ethers?


298) With a change in hybridisation of the carbon bearing the charge, the stability of a carbanion increase in the
order


299) Which of the following compounds are not arranged on order of decreasing reactivity towards
electrophilic substitution?


300) A mixture of camphor and benzoic acid can be separated by


301) Resonance energy is more for


302) Grignard reagent adds to


303) Which of the following is not chiral?


304) Detection of phosphorus in the compound can be done by its conversion into phosphate. Reagent to
identify phosphate ion is


305) The hemolytic fission of a hydrocarbon results in the formation of:


306) Methoxy methane and ethanol are


307) Which one of the following monoenes does not exhibit geometric isomerism?


308) When two halogen atoms are attached to two adjacent carbon atoms, the dihaloalkane is called :


309) The electrophile involved in the sulphonation of benzene is


310) In Kjeldahl’s method, then nitrogen present in the organic compound is quantitatively converted into


311) The compound which gives the most stable carbonium ion on dehydration is


312) A similarity between optical and geometrical isomerism is that :


313) Reaction of phenol with chloroforms/sodium hydroxide to give o-hydroxy benzaldehyde involves the
formation of


314) Which kind of fission is favoured by sunlight?


315) Which class of compounds can exhibit geometrical isomerism?


316) Which of the following compounds is optically active?


317) To which ring size cycloalkanes, Baeyer’s strain theory is not valid?


318) Which of the following orders is not correct regarding the – I effect of the substitutents?


319) Lactic acid shows optical activity in :


320) In cyclopropane, cyclobutane and cyclohexane, the common group is


321) Allyl isocyanide has :


322) +I effect is shown by


323) Which one of the following is the stable structure of cyclohexatriene?


324) Total number of rotational conformers of n-butane are :


325) Sublimation is a process in which a solid


326) The group named as benzal possesses ……nature.


327) 29.5 mg of organic compound containing nitrogen was digested according to Kjeldahl’s method and the
evolved ammonia was absorbed in 20mL of 0.1 M HCl solution. The excess of the acid required 15mL of
0.1M NaOH solution for complete neutralisation. The percentage of nitrogen in the compound is


328) The highest electrical conductivity of the following aqueous solutions is of


329) Nucleophiles are :


330) Ethyl acetoacetate exhibits :


331) A molecule of urea can show


332) Geometrical isomerism is possible in case of


333) Anti-Markownikoff addition of HBr is not observed in :


334) The number of 1°, 2° and 3° carbon atoms present in isopentane are respectively :


335) The restricted rotation about carbon-carbon double bond in 2-butene is due to:


336) Formation of acetylene from ethylene is an example of


337) The structure of cis-bis (propenyl) ethane is :


338) The compound which reacts with HBr obeying Markownikoff’s rule is:


339) A molecule of benzene contains :


340) Zn—Cu couple used as reducing agent is :


341) Considering the state of hybridization of carbon atoms, find out the molecule among the following which is
linear?


342) Tautomerism is not exhibited by


343) Which of the substance is purified by sublimation?


344) The number of optical enantiomorphs of tartaric acid :


345) Which of the following is useful for making pure water from a solution of salt in water?


346) Which of the following does not contain chiral carbon atom?


347) Among the following orbital bonds, the angle is minimum between :


348) Polarization of electron in acrolein may be written as


349) Two crystalline forms of a substance, one being a mirror image of the other are called :


350) Hyperconjugation is


351) Which one of the following reactions is a condensation reaction?


352) Which group has the maximum-Inductive effect?


353) Which is incorrect about enantiomorphs?


354) Which one is the seniormost functional group in the nomenclature of an organic compound if it possesses
more than one functional group?


355) The reaction intermediate produced, by homolytic cleavage of a bond is called


356) Fractional distillation is useful in distillation of


357) Which of the following species is paramagnetic?


358) Free radical has unpaired electron.


359) Select the organic compound which was prepared for the first time in laboratory from its elements :


360) Which of the following compounds can exist in optically active form?


361) Select the most reactive cycloalkane :


362) Glyoxal is


363) IUPAC name of acraldehyde is


364) What information is provided by reaction mechanism?


365) The enolic from of acetone contains


366) Which of the following acids has the smallest dissociation constant?


367) Among the following the strongest nucleophile is


368) Which of the following statements is correct?


369) Which of the following species does not exert a resonance effect?


370) Lactic acid molecule has


371) The arrangement of atoms that characterises a particular stereoisomer is called :


372) An alkane forms isomers if the number of carbon atoms is :


373) Which of the following statements is correct?


374) Qualitative test of halogens in an organic compound is made by


375) Which one of the following will most readily be dehydrated in acidic conditions?


376) The family to which methoxyethene belongs, is :


377) Electrophiles are :


378) Iso-propyl chloride undergoes hydrolysis by


379) Carbon and hydrogen are estimated in organic compounds by


380) The compound having highest dipole moment is :


381) A free radical is :


382) In electrophilic aromatic substitution reaction, the nitro group is meta directing because it


383) Which of the following conformers for ethylene glycol is most stable?


384) Which of the following compounds is resistant to nucleophilic attack by hydroxy ion?


385) The stabilization due to resonance is maximum in :


386) A mixture of camphor and benzoic acid can be easily separated by


387) Fractional crystallisations is carried out to separate a mixture of


388) The type of isomerism observed in urea molecule is :


389) Which of the following intermediate have the complete octet around the carbon atom?


390) A neutral divalent carbon intermediate produced by the removal of two attached atoms is called :


391) Which types of isomerism is shown by 2, 3-dichlorobutane?


392) Among the following compounds, the most acidic is


393) Electrophiles are :


394) On monochlorination of n-pentane, the number of isomers formed is :


395) Cyclohexane is :


396) Which of the following is a primary halide?


397) The percentage of ′s′ character of the hybrid orbital of carbon in ethane, ethane and ethyne respectively
are :


398) Which is a chiral molecule?


399) The stability of a carbonium ion depends upon


400) Bromination of alkanes involves


401) The isomeric cis-2-butene and trans-2-butene can be distinguished on the basis of :


402) Lassaigne’s test is not used for the detection of


403) The simplest formula of a compound containing 50% of element X (at. wt 10) and 50% of element Y (at.
wt. 20) is


404) n-pentane, iso-pentane, and neo – pentane are examples for isomers of the type


405) Homolytic fission of C— C bond in ethane gives an intermediate in which carbon is ….hybridized.


406) Pick out the correct statement from the following and choose the correct answer from the codes given
below
I. Hexa-1, 5-diene is a conjugated diene
II. Prop-1, 2-diene is conjugated diene
III. Hexa-1, 3-diene is a conjugated diene
IV. Buta-1, 3-diene is an isolated diene
V. Prop-1, 2-diene is a cumulative diene


407) Which among the following is the correct IUPAC name of isoamylene?


408) Which of the following compounds exhibits geometrical isomerism?


409) Which one of the following compounds, is most acidic?


410) An organic compound has carbon and hydrogen percentage in the ratio 6:1 and carbon and oxygen
percentages in the ratio 3:4. The compound has the empirical formula


411) Among the following the one which does not exhibit functional group isomerism is :


412) Which one of the following is a secondary alcohol?


413) Electromeric effect is


414) The angle of rotation of plane of polarized light depends upon :


415) Which of the following shows geometrical isomerism?


416) Which of the following cannot undergo nucleophilic substitution under ordinary conditions?


417) The C— C bond length of the following molecules is in the order.


418) Isomerism among compounds due to the migration of a proton is known as :


419) Removal of hydrogen atom is easier when it is attached to :


420) The order of stability of carbanions is :


421) Glycerine contains


422) Which of the following pairs of carbon skeletons in an example of isomerism?


423) In the following the most stable conformation of n-butane is :


424) An electrophilic reagent must have


425) Which one of the starred carbons is the asymmetric one?


426) The chemical name of anisole is


427) How many optically active stereomers are possible for butan-2, 3-diol?


428) Naphthalene molecule contains :


429) The first organic compound urea was synthesized in the laboratory by:


430) Which of the following is not a nucleophile?


431) Which of the following compounds can exhibit optical isomerism?


432) Which is the most stable carbocation?


433) The correct structure of 4-bromo-3-methyl-but-1-ene.


434) Which method is used to separate sugars?


435) Sublimation can't be used for purification of


436) Which of the following is phenyl ethanoate?


437) Zero inductive effect is shown by :


438) Which of the following alkyl halides is used as a methylating agent?


439) Which one of the following has the most nucleophilic nitrogen?


440) Chlorobenzene is 0, p-directing in electrophilic substituting reaction. The directing influence is explained
by


441) Which of the following orders regarding relative stability of free radicals is correct?


442) Carbon tetrachloride has no net dipole moment because of :


443) The isomers which are interconverted through rotation around a single bond are


444) The number of optical isomers of pent-3-en-2-ol is :


445) Dehydrohalogenation of an alkyl halide is a/an


446) The minimum number of carbon atoms which a ketone may contain is :


447) What is the formula of tertiary butyl alcohol?


448) The IUPAC name of neopentane is


449) Select the strongest bond :


450) Which of the following molecules is achiral?


451) An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon. The
ester formed will be


452) Which of the following statements is necessarily true in the case of isomeric organic compounds?


453) Cis - trans, isomers generally


454) Among the following compounds nitrobenzene, benzene, aniline and phenol, the strongest basic behaviour
in acid medium is exhibited by :


455) Geometrical isomerism is not shown by :


456) An optically active compound is :


457) In Lassaigen's test, the organic compound is fused with a piece of sodium metal in order to


458) Which of the following sodium compound/compounds are formed when an organic compound containing
both nitrogen and sulphur is fused with sodium?


459) In hyperconjugation, the atom involved is :


460) Reactivity of hydrogen atoms attached to different atoms in alkanes has the order :


461) Which has maximum percentage of chlorine?


462) Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?


463) Why is light necessary to bring in chlorination reactions of alkane?


464) For all practical purposes, influence of inductive effect is neglected after :


465) Geometrical isomers differ in :


466) The study of three dimensional structure of molecule is called :


467) Which of the following contains only three pairs of electrons?


468) 2-hexyne gives trans-2-hexene on treatment with


469) Lassaigne’s test for the detection of nitrogen fails in


470) The relative adsorption of each component of the mixture is expressed in terms of


471) t-butyl alcohol is


472) A compound containing 80% C and 20% H is likely to be


473) Overlap of which of the following atomic orbitals would be maximum to form the strongest covalent bond?


474) During elimination reactions, the hybrid state of carbon atoms involved in change shows:


475) Who proposed the tetrahedral mirror image structures to a pair of enantiomers?


476) Heterolysis of propane gives :


477) Delocalised electrons are present in


478) Compounds which rotate plane polarised light in clockwise direction are known as :


479) Carbanions initiate :


480) Impure glycerine can be purified by


481) IUPAC name of urea is :


482) Which of the following process is not used for the purification of solid impurities?


483) Dehydration of alcohol is an example of which type of reaction?


484) The organic liquid that mix freely with water is :


485) The best method for the separation of naphthalene and benzoic acid from their mixture is


486) The reagent used in dehydrohalogenation process is :


487) Hydride shift from C-2 will give the most stable resonance stabilized carbocation as


488) Hyperconjugation involves overlap of the following orbitals


489) Most stable carbonium ion is


490) During a nitration of benzene, the attacking electrophile is


491) The (R) and (S) enantiomers of an optically active compound differ in


492) The number of chiral centres in (+) –glucose


493) Hydrogen cyanide and hydrogen isocyanide are :


494) Which of the following hydrocarbons is most unsaturated?


495) Sometimes the behaviour of a compound is explained by assuming that it exists in a world between two or
more different possible structures. This phenomenon is called :


496) Which one of the following pairs represents stereoisomerism?


497) The large number of organic compounds is due to:


498) Formic acid is a stronger acid than acetic acid. This can be explained using


499) The energy of C— C triple bond in acetylene in kcal is :


500) In which of the following molecules, the resonance effect is not present?


501) The tautomeric form which is less stable is called :


502) The effect involving the complete transfer of a shared pair of electrons to one of the atoms joined by a
multiple bond at the requirement of attacking reagent is called :


503) Which of the following acids does not exhibit optical isomerism?


504) Which of the following conformations of cyclohexane is chiral?


505) Which type of isomerism is shown by propanal and propanone?


506) The best method to separate the mixture of ortho -and-para nitrophenol (1:1) is


507) Which of the following does not show electrometric effect?


508) Shifting of electrons of a multiple bond under the influence of a reagent is called :


509) 0.4 g of a silver salt of a monobasic orgainc acid gave 0.26 g pure silver on ignition. the molecular weight of
the acid is (atomic weight of silver=108)


510) Which pair represents chain isomers?


511) The number of valence electrons in the excited carbon atom is :


512) A hydrocarbon contains 10.5 g carbon and 1 g hydrogen. Its 2.4 g has 1 L volume at 1 atm and127℃.
Hydrocarbon is


513) A mixture of oil and water is separated by


514) The structural formula of methyl aminomethane is :


515) The number of optically active isomers of tartaric acid are


516) Which of the following has the highest degree of coordination bond?


517) A mixture of o-nitrophenol and p-nitrophenol can be separated by


518) State the hybridization of carbon present in triplet carbene


519) Which of the following cannot show electromeric effect ?


520) Hydride ion transfer takes place in


521) An organic compound contains 29.27% carbon, 5.69 % hydrogen and 65.04% bromine. Its empirical
formula is


522) The function of soda lime, a mixture of solid NaOH and solid CaO during decarboxylation of carboxylic
acids is :


523) A racemic mixture is a mixture of :


524) A mixture of iodine and sodium chloride can be easily separated by


525) The property by virtue of which a compound can turn the plane of polarization of light is known as :


526) Correct order of stability is


527) In the estimation of sulphur in an organic compound, fuming nitric acid is used to convert sulphur into


528) Which of the following will be chiral?


529) Which of the following is not a nucleophile?


530) Least stable conformer of cyclohexane is


531) The compound isomeric with acetone is :


532) Which of the chloride is less reactive towards hydrolysis?


533) Glycerol is an alcohol which can be classified as


534) The electromeric effect in organic compounds is a :


535) Copper wire test of halogens is known as


536) Which of the following is singlet carbine?


537) Which of the following will be easily nitrated?


538) Optical isomerism is shown by


539) Williamson’s synthesis involves


540) Free radicals can undergo :


541) Metamers of ethyl propionate are


542) During addition of bromine on ethene, the first species formed is


543) Which one is not is IUPAC system?


544) The compound which exhibits optical isomerism is :


545) Homologous compounds have :


546) How many chiral compound are possible on mono chlorination of 2-methyl butane?


547) Which of the following IUPAC names is correct?


548) Ethyl acetoacetate shows, which type of isomerism?


549) Enol content is highest in


550) The maximum number of stereoisomers possible for 3-hydroxy-2-methyl butanoic acid is :


551) Which of the following will exhibit cis - trans isomerism?


552) Which of the following is most reactive towards electrophilic nitration?


553) Ethylene dichloride and ethylidine chloride are isomeric compounds. The false statement about these
isomers is that they


554) Which of the following compounds has incorrect IUPAC nomenclature?


555) The IUPAC name for tertiary butyl iodide is


556) Geometry of methyl free radical is


557) Dehydrogenation of ethanol to give ethanal is :


558) Which one of the following compounds will be most readily dehydrated ?


559) Among the following compounds (I-III) the correct order of reaction with the electrophile is


560) Which of the following is an electrophile?


561) An organic compound having carbon, hydrogen and sulphur contains 4% of sulphur. The minimum
molecular weight of the compound is


562) The structure of tertiary butyl carbonium ion is :


563) A carbonium ion contains :


564) The formula of 3-chloro-2,2-dimethylbutane is :


565) Which shows the easier electrophilic substitution in ring?


566) The number of isomeric pentyl alcohols possible is


567) Naphthalene can be easily purified by


568) The correct structure of dimethylbutyne is :


569) Which of the following is free radical?


570) Quantitative measurement of nitrogen in an organic compound is done by the method


571) During pyrolysis of an alkane, C— C bond breaks faster than the C— H bond because :


572) State of hybridization of carbon atom of carbene in the singlet state is :


573) The number of 1° and 2°carbon atoms in n-pentane are respectively :


574) In benzene, all the C - C bonds are of equal length because of :


575) Nitration of benzene is


576) Nitrogen containing organic compound when fused with sodium forms


577) Which of the following is strongest nucleophile?


578) In Kjeldahl's method for the estimation of nitrogen, the formula used to


579) The most satisfactory method to separate sugars is to use


580) The structures that do not actually exist are called :


581) Which of the following is the most stable carbocation?


582) Which one of the following compound is most acidic?


583) The number of carbon atoms present in neopentane are :


584) The Cl—C—Cl angle in 1,1,2,2-tetrachloroethene and tetrachloromethane respectively will be about :


585) The number of possible enantiomeric pairs that can be produced during monochlorination of 2-methyl
butane is :


586) Chromatography technique is used for the separation of


587) The stability of the carbocation decreases in the order


588) What will be the compound if two valencies of carbonyl group are satisfied by two alkyl groups?


589) The most stable carbocation is :


590) Which of the following belongs to – I group?


591) Which is most commonly used to dry organic liquids?


592) In Lassaigne's solution, pink/violet colouration is produced when sodium nitroprusside solution is added.
It indicates the presence of


593) A carbonium ion is formed when a covalent bond between two atoms in an organic compound undergoes :


594) Racemic mixture is formed by mixing two


595) In a solution, solvent can be separated from solute by one of the following process


596) Buta-1,3-diene and But-2-yne are :


597) The intermediate during the addition of HCl to propene in the presence of peroxide is :


598) Which of the following represents neo- pentyl alcohol?


599) 2-methyl-2-butene will be represented as :


600) The most abundant organic compound in the world is :


601) The chain initiating species in free radical chlorination of methane is :


602) Which of the following belongs to +I group?


603) Different structures generated due to rotation about, C – C axis, of an organic molecule, are examples of


604) Which of the following molecules is expected to rotate the plane of plane-polarised light?


605) Chromatography was discovered by


606) Sodium nitroprusside when added to an alkaline solution of sulphide ions produces a colouration


607) Isopentane can form four isomeric mono bromo derivatives. How many of them are optically active?


608) Which one of the following does not show resonance?


609) Select the organic compounds aliphatic in nature but burn with smoky flame :


610) Which of the following is an electrophilic reagent?


611) A mixture of iron fillings and sulphur cannot be separated by


612) Isomers of propionic acid are


613) Reactions involving heterolytic fission are said to proceed via :


614) Which of the following orders is true regarding the acidic nature of COOH?


615) Which behaves both as a nucleophile as well as an electrophile?


616) In which case the carbon-carbon bond length is same?


617) Incorrect statement is


618) Which one of the following explain, why propene undergo electrophilic addition with HBr, but not with
HCN?


619) Select the correct statement about the detection of sulphur in organic compounds


620) Rotation of plane polarized light can be measured by :


621) A molecule having three different chiral carbon atoms, how many stereoisomers it will have?


622) Which of the following is the strongest base?


623)
Intermediate product formed in the acid catalysed dehydration of n-propyl alcohol is :


624) Which of the following has the highest nucleophilicity?


625) Anthracene is purified by


626) Chiral molecules are those which:


627) Who is called the ‘Father of Chemistry’?


628) With a change in hybridization of the carbon bearing the charge, the stability of a carbanion increase in the
order


629) The total number of alkenes possible by dehydromination of 3-bromo-3-cyclopentylhexane using alcoholic
KOH is


630) The Cl—C—Cl bond angle in dichloro methane will be :


631) In the following reaction sequence, the chain initiation steps is :


632) The most stable carbanion is


633) If a compound on analysis was found to contain C = 18.5%, H = 1.55%, Cl =55.04% and O = 24.81% then
its empirical formula is


634) 2-pentanone and 3-methyl-2-butanone are a pair of ….. isomers.


635) Liebig’s test is used to estimate


636) In fructose, the possible optical isomers are


637) Which structure can be explained by taking ground state configuration of atom?


638) Which one of the following carbanions is the least stable?


639) Which one of the following is the most energetic conformation of cyclohexane?


640) The energy difference between the chair and boat form of cyclohexane is :


641) Addition of HI on double bond of propene yields isopropyl iodide as major product. It is because the
addition proceeds through :


642) The IUPAC name of neopentane is :


643) In Carius method of 0.099 g orgainc compound gave 0.287 g AgCl. The percentage of chlorine in the
compound will be


644) The most common type of reaction in aromatic compounds is


645) Arrange the following carbocations in order of stability
benzyl allyl methyl vinyl
I II III IV


646) The prefix name of —SH group in IUPAC system is :


647) Fractional distillation is a process by which the separation of different fractions from mixture of solution is
carried by making use of the following property of the fractions


648) Which of the following is an electroplile?


649) Which of the following is singlet carbine?


650) Which of the following is the correct order of priority of groups in D-glyceraldehyde?


651) o-hydroxytoluene and benzyl alcohol are :


652) Which of the following would react most readily with nucleophiles?


653) Which group has the highest + Inductive effect?


654) The Prussian blue colour obtained during the test of nitrogen by Lassaigne;s test is due to the formation of


655) Which of the following statements is correct?


656) Which of the following possesses an sp-hybridized carbon in its structure?


657) Di-chloroacetic acid is a stronger acid than acetic acid.
This due to occurrence of


658) In which of the following ways does the hydride ion tend to function?


659) The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC
system of nomenclature is


660) Which of the following statements is incorrect?


661) For the purification, isolation and separation of organic compounds, the latest technique followed is


662) Arrange p-toluidine (I) N,N-dimethyl-p- toluidine (II) p- nitroaniline (III) and aniline (IV) in order of
decreasing basicity


663) The reagent showing addition on alkene against the Markownikoff’s rule of :


664) Carbocation can undergo :


665) Lactic acid is :


666) Of the following compounds which will have a zero dipole moment?


667) Isomerism exhibited by acetic acid and methyl formate is :


668) In IUPAC suffix name of —COX is :


669) Which one of the following compounds is most reactive towards nucleopilic addition?


670) Which of the following is the most stable cation?


671) Which of the following species is not electrophilic in nature?


672) The Beilstein test for organic compound is used to detect


673) Which of the following statements is not characteristic of free radical chain reaction?


674) The presence of carbon in an organic compound is detected by heating it with


675) Which one is an elimination reaction?


676) Identify the compound that exhibits tautomerism


677) Which of the following is an electrophile?


678) The formula of ethanenitrile is :


679) Which of the following acids shows stereoisomerism?


680) Mark the incorrect statement in nitrogen Kjeldahl's method of estimation


681) Which of the following orders is correct regarding the –I effect of the substituents?


682) The ease of dehydrohalogenation of alkyl halide with alcoholic KOH is


683) Lactic acid in which a methyl group, a hydroxyl group, a carboxylic acid group and a hydrogen atom are
attached to a central carbon atom shows optical isomerism due to the molecular geometry at the :


684) Which of the following process is suitable for the purification of aniline?


685) Maleic and fumaric acids are :


686) Which one is least reactive in a nucleophile substitution reaction?


687) Number of tertiary carbon atoms in tertiary butyl alcohol is :


688) The correct sequence of steps involved in the mechanism of Cannizzaro’s reaction is


689) Propanol and propanone are


690) Diastereomers can be separated by :


691) Angle strain in cyclopropane is


692) A mixture of acetone and methanol can be separated by


693) The oxygen atom in phenol


694) 2-methylpent-3-enoic acid shows :


695) Pyridine is :


696) The reason for the loss of optical activity of lactic acid when – OH group is changed by H is that


697) Which of the following compounds exhibits rotamers?


698) The correct order of nucleophilicity among the following is :


699) Ammonia molecule is :


700) 0.5 g of hydrocarbon gave 0.9 g water on combustion. The percentage of carbon hydrocarbon is


701) Which one of the following is most reactive towards electrophilic attack?


702) Identify, which of the below does not possess any element of symmetry?


703) Geometrical isomerism is shown by :


704) When thiourea is heated with metallic sodium, the compound which can't be formed is


705) The racemisation of optically active compounds is driven by :


706) The correct name for the following hydrocarbon is


707) Which of the following is the most stable radical?


708) The number of 4° carbon atoms in 2,2,4,4-tetramethylpentane :


709) Inductive effect involves


710) Compounds whose molecules are superimposable on their mirror images even though they contain
asymmetric carbon atoms or chiral centres are known as :


711) Percentage of hydrogen is maximum in .


712) Which of the following has most acidic hydrogen?


713) Ease of abstraction of hydrogen is greater when attached to :


714) Steam distillation is based on the fact that vaporisation of organic liquid takes place at


715) The hybridization of central carbon atom in 1,2- propadiene (allene) is


716) The kind of delocalisation involving sigma bond is called


717) In the case of homologous series of alkanes, which one of the following statements is incorrect?


718) Which of the following reagents will be fruitful for separating a mixture of nitrobenzene and aniline?


719) The name formic acid was given for HCOOH because it was prepared from :


720) 2, 3-dimethyl hexane contains ….. tertiary ….. secondary and ……primary carbon atmos, respectively


721) Which one of the following is the correct formula for dichlorodiphenyltrichloro ethane?


722) How many sigma and pi bonds are there in the molecule of di cyano ethane (CN - CH - CH - CN)?


723) Out of the following, the alkene that exhibits optical isomerism is


724) Carbanion can undergo :


725) Percentage composition of an organic compound is as follows
C=10.06, H=0.84, Cl=89.10
Which of the following corresponds to its molecular formula if the vapour density is 60.0?


726) Which of the following is most reactive towards nucleophilic substitution reaction?


727) Which among the following statements is correct with respect to the optical isomers?


728) Which of the following is most basic?


729) Which of the following compounds is not chiral?


730) What is the number of possible optical isomers in glucose?


731) In which reaction addition takes place according to Markownikoff’s rule?


732) Presence of halogen in organic compounds can be detected using


733) The bond energy for catenation next to carbon is :


734) The hydrolysis of alkyl halides by aqueous NaOH is best termed as :


735) Which of the following compounds exhibit stereoisomerism?


736) The + I.E(inductive effect) is shown by :


737) In paper chromatography


738) Which one of the following is not found in alkenes?


739) Select the correct statement :


740) A compound contains 2 dissimilar asymmetric carbon atoms. The number of optically active isomers is :


741) The inductive effect


742) If there is no rotation of plane polarised light by a compound in a specific solvent, though to be chiral, it
means that :


743) Formation of ethylene from acetylene is an example of


744) Which of the following is nucleophilic addition reaction?


745) The reagent used in dehalogenation process is :


746) Benzaldoxime exists in how many forms?


747) Resonance arises due to the :


748) Which one of the following pair represents stereoisomerism?


749) Stereoisomerism is of two types, geometrical and
optical.


750) Which of the following compounds is expected to be optically active?


751) Which of the following is least reactive in a nucleophilic substitution reaction?


752) During debromination of meso-dibromo-butane, the major compound formed is :


753) What is the empirical formula of a compound having 40% carbon, 6.66% hydrogen and 53.34% oxygen?


754) Which of the following can act as an nucleophile?


755) In Lassaigne’s test, a blue colour is obtained if the organic compound contains nitrogen. The blue colour is
due to


756) According to Gahn-Ingold-Prelog sequence rules, the correct order of priority for the given group is


757) How many chiral isomers can be drawn from 2-bromo, 3-chloro butane?


758) Glycerol can be separated from spent-lye in soap industry by


759) Correct gradation of basic charactor


760) An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73. Molecular
formula of compound is


761) Vital force theory of the origin of organic compounds was discarded by :


762) In the presence of peroxide, hydrogen chloride and hydrogen iodide do not give anti-Markownikoff
addition to alkenes because :


763) One is oxidizing and the other is reducing


764) Which of the following is the correct order of stability of different conformations of butane?


765) Glucose and fructose are :


766) Eelipsed and staggered forms of n-butane are called a pair of :


767) Arrange the following in order of increasing dipole moment (I) Toluene (II)m-dichlorobenzene (III) o-
dichlorobenzene (IV) p-dichlorobenzene :


768) In butane, which of the following forms has the lowest energy?


769) Molecular mass of a volatile substances may be obtained by


770) Which is not deflected by a non-uniform electrostatic field?


771) Correct order of nucleophilicity is


772) Due to the presence of an unpaired electron free radicals are


773) Which of the following will have meso isomers also?


774) The addition of HBr on butene-2 in presence of peroxide follow the:


775) Which represents nucleophilic aromatic substitution reaction?


776) Ethoxy ethane and methoxy propane are :


777) Which of the following aromatic acid is most acidic?


778) The hybridization of carbon in diamond, graphite and acetylene is in the order:


779) Which is optically active?


780) Which of the following statement is wrong?


781) What kind of isomerism is possible for 1-chloro-2-nitroethene?


782) Acetonitrile is


783) Formation of cyanohydrin from a ketone is an example of


784) An organic compound which produces a bluish green coloured flame on heating in presence of copper is


785) The compound abd C—C abd will exist in :


786) The C - H bond distance is longest in


787) The yield in organic reactions is generally poor because the reactions are :


788) Which of the following resonating structures of 1-methoxy-1, 3-butadiene is least stable?


789) A student named the compound as 1,4-butadiene :


790) The number of different substitution products possible when ethane is allowed to react with bromine is
sunlight are :


791) Phenol is more acidic than


792) During the fusion of an organic compound with sodium metal, nitrogen of the compound is converted into


793) The structure representing a heterocyclic compound is :


794) Which of the following reactions is an example of nucleophilic substitution reaction?


795) In which of the following species the central carbon atom is negatively charged?


796) Optically active compound among the following is :


797) Which of the following compounds will be most reactive towards nucleophilic addition reaction?


798) n-pentane and neopentane are :


799) The IUPAC name of acryldehyde is


800) Due to presence of an unpaired electron, free radicals are


801) 2-methylpent-3-ene is a chiral because it has :


802) Which of the following molecules contain asymmetric carbon atom?


803) Cyclobutane and butene-1 are :


804) Which of the following is not true for carbanions?


805) Which of the following structures permits cis-trans isomerism?


806) Which one of the following compound will show optical iosmerism?


807) The Kolbe’s electrolysis proceeds via


808) Which of the following statements is not correct?


809) Adsorbent is made of ... in TLC


810) The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen
was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium
hydroxide solution for complete neutralization. the organic compound is


811) The structure remaining after one H is removed from hydrocarbon is :


812) Tautomerism is exhibited by


813) Which of the following statements is incorrect?


814) Base strength of,


815) Which of the following Fischer’s projection formula is identical to D-glyceraldehyde?


816) Among the following the dissociation constant is highest for


817) Which of the following is a dynamic isomerism?


818) Which among the following statements is correct with respect to the optical isomers?


819) Duma's method involves the determination of nitrogen content in the organic compound in the form of


820) n- pentane and 2-methyl butane are a pair of


821) Amongst the following the compound that can most readily get sulphonated is


822) In E2 elimination, some compounds follow Hofmann’s rule which means:


823) How many asymmetric carbon atoms are present in
(i) 1, 2-dimethylcyclohexane
(ii) 3-methylcyclopentane and
(iii) 3-methylcyclohexene?


824) Which of the following is a chiral compound?


825) The maximum number of possible optical isomers in 1-bromo-2-methyl cyclobutane is


826) Vinyl alcohol and acetaldehyde are :


827) Stereoisomers (geometrical or opticals) which are neither superimposable nor mirror image to each other
are called :


828) Which one of the following will show optical isomerism?


829) Chloroacetic acid is a stronger acid than acetic acid. This can be explained using


830) The basicity of aniline is less than that of cyclohexylamine. This is due to


831) Dehydration of alcohol usually goes by


832) Geometrical isomerism is possible in


833) The maximum number of possible optical isomers in 1-bromo-2-methyl cyclobutane is


834) Ethers are isomeric with


835) Vinyl chloride undergoes


836) Fischer projection indicates :


837) Acetone and propen-2-ol are :


838) The number of stereoisomers obtained by bromination of trans - 2 -butene is?


839) The compound which forms one monochloro product when treated with chlorine is :


840) Maleic acid and fumaric acid are


841) Which represents the condensed formula for pentanes?


842) Which of the substance is purified by sublimation?


843) The halogen compound which most readily undergoes nucleophilic substitutions is


844) Which of the following order is correct regarding the acidity of carboxylic acids?


845) Reaction of methyl bromide with aqueous sodium hydroxide involves


846) The following compound will undergo electrophilic substitution more readily than benzene


847) Which of the following elements can't be detected by direct tests?


848) Position isomerism is shown by :


849) Formulae of phenyl carbinol and chloral are respectively :


850) The reaction of sodium ethoxide with iodoethane to from diethyl is termed as


851) The sodium extract of an organic compound on acidification with acetic acid and addition of lead acetate
solution gives a black precipitate. The organic compound contains


852) The silver salt of a monobasic acid on ignition gave 60% of Ag. The molecular weight of the acid is


853) The resonating structures :


854) How many optically active stereoisomers are possible for butane-2, 3-diol?


855) Removal of a hydride ion from a methane molecule will give a:


856) Which of the following will have a meso-isomer also?


857) Which chlorine atom is more electronegative in the following?


858) The resonating structures :


859) The optical isomers, which are not enantiomers, are called


860) Which of the following orders is correct regarding the acidity of carboxylic group?


861) Geometrical isomerism is shown by


862) Which one of the following is s-butyl phynylvinyl methane?


863) Bicyclo (1,1,0) butane is


864) The reaction of sodium ethoxide with iodoethane to from diethyl is termed as


865) Which of the following is most reactive towards elimination reaction?


866) The number of isomeric hexanes is


867) The substitution reaction among the following is


868) The most stable carbocation is


869) Which of the following statements is not correct?


870) How many chiral carbon atoms are present in 2, 3, 4- trichloropentane?


871) Which one of the following compounds is most polar?


872) Geometrical isomerism is not shown by


873) The change in optical rotation with time of freshly prepared solution of sugar is known as:


874) Which of the following does not show stereo isomerism?


875) One of the following compounds exhibit geometrical iosmerism


876) Which one of the following shows functional isomerism?


877) In the reaction of phenol with chloroform and aqueous solution of NaOH at 70°C, the electrophile attacking
the ring is


878) The production of an optically active compound from a symmetric molecule without resolution in termed
as :


879) Which of the following statement is not applicable to Beilstein test?


880) Essential oils can be isolated by


881) Mesomeric effect involves delocalisation of


882) Which of the following species is paramagnetic in nature?


883) Isobutyl chloride is :


884) Which one of the following compounds is capable of existing in a meso form?


885) Geometrical isomerism is caused :


886) Lassaigne's test is used for the detection of


887) Which of the following is arranged according to the nature indicated?


888) Example of geometrical isomerism is


889) Which of the following is an example of elimination reaction?


890) Which nomenclature in IUPAC is not correct?


891) The C—C bond angle in cyclopropane is :


892) Absolute alcohol cannot be obtained by simple fractional distillation because


893) Racemic compound has


894) In case of a homologous series each member differs from the preceding or the succeeding member by :


895) Vaccum distillation is used to purify liquids which


896) Which of the following is the weakest base?


897) The structure which has positive charge on the oxygen atom :


898) Statement 1: Lessaigne's test is the for nitrogen only
Statement 2: If halogens are present in organic compound, it react with sodium to form sodium halides
which dissolves in water


899) Statement 1: Benzoic acid is purified by sublimation process
Statement 2: Sublimation process is very useful in separating a volatile solid from a non-volatile solid


900) Statement 1: The molality of the solution does not change with change in temperature.
Statement 2: The molality of the solution is expressed in units of moles per 1000 g of solvent.


901) Statement 1: ‘A Victor Mayer tube’ of hard glass, having a side-tube, leading to the arrangement for
collection of displaced air over water.
Statement 2: An outer jacket of copper, containing a liquid boiling at nearly 30℃ higher than the
substance whose molecular mass is to be determined


902) Statement 1: Normally and molarity can be calculated from each other.
Statement 2: Normally is equal to the product of molarity and n.


903) Statement 1: Carbanion like ammonia have pyramidal shape
Statement 2: The carbon atom carrying negative charge has an octet of electrons