Practice Test


1) Petroleum is found


2) The conversion of liquid hydrocarbon into a mixture of gaseous compounds by heat alone is known as


3) Natural gas is a mixture of


4) Petrol or gasoline used as an automobile fuel is a mixture of


5) Out of the following fractions of petroleum the one having the lowest boiling point is


6) Most of the hydrocarbons from petroleum are obtained by


7) An ocatane number 100 is given to


8) Tetraethyl lead is used as


9) On cracking petrol we get


10) The source of kerosene is


11) Oil obtained from petroleum is called


12) A knocking sound is produced more in the engine when the fuel contains mainly


13) The gas believed to be the cause of explosion in coal-mines


14) The synthesis gas is


15) Octane number is


16) The flash point in India is fixed at


17) Octane number of 2,2,3-trimethylbutane has been assumed to be


18) Which among the following are used as catalyst in cracking


19) Indane is


20) Which of the following is not a mixture of hydrocarbons


21) Octane number is related to the petroleum product


22) Which of the following is not a petroleum product.


23) Gasoline has composition


24) The tar which is used to make roads is a solid known as


25) Cetane number of diesel fuel increases with the addition of


26) Which of the following has highest octane number


27) Octane number can be changed by


28) The chemical added to leaded petrol to prevent the deposition of lead in the combustion chamber is :


29) A fuel has the same knocking property as a mixture of 70% iso -octane (2,2, 4 - Trimethylpentane) and 30% n-heptane by volume. The octane number of the fuel is


30) Which of the following substances is used as an antiknock compound


31) Octane number is zero for


32) Which one of the following has lowest octane number ?


33) Marsh gas mainly contains


34) Photochemical chlorination of alkaline is initiated by a process of


35) Electrolysis of potassium acetate given


36) The substance that would not at all be formed during the reaction of methane and chlorine in the presence of sunlight is


37) Among the paraffins it is generally found that with an increase in the molecular weight


38) Which reagent can be used to convert, halides, alcohols, carbonyl compounds, acids, etc., to alkane.


39) Decarboxylation of isobutyric acid leads to


40) The product obtained when methyl magnesium bromide reacts with methyl alcohol


41) Hexachoroethane is also called


42) Halogenation of alkanes is an example of


43) The addition of oxygen gas to reaction mixture of chlorine and methane (photochemical chlorination)


44) As compared to melting points even carbon chain isomers, the melting points of odd carbon chain alkanes are


45) Methyl bromide heated with zinc in closed tube produces


46) Paraffins dissolve in


47) The most reactive alkane is


48) During Wurtz reaction, which of the following is sometimes also obtained because of decomposition of free radicals


49) Bromination of an alkane as compared to chlorination proceeds


50) When a mixture of methane and oxygen is passed through heated molybdenum oxide, the main product formed is


51) How many monochlorobutanes will be obtained on chlorination of n-butane ?


52) Hydrocarbon which is liquid at room temperature is


53) The chemicals and the reaction conditions required for the preparation of ethane are


54) Which of the following method is most appropriate for the manufacture of methane ?


55) Reaction of alkanes with halogens is explosive in case of


56) When an aqueous solution containing sodium acetate and sodium propionate is electrolysed we get


57) On treating a mixture of two alkyl halides with sodium metal in dry ether, 2-methylpropane was obtained. The alkyl halides are


58) The most stable free radical among the following is


59) The order of reactivity of halogens in aliphatic substitution reactions is


60) In Wurtz reaction the reagent used is


61) Pure methane can be produced by


62) On mixing certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane. The alkane is


63) Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon ?


64) The highest boiling point is expected for


65) A mixture of ethyl iodide and n-porpyl iodide is subjected to Wurtz reaction. The hydrocarbon which will not be formed is


66) What would be the product formed when 1-Bromo-3-chlorocyclobutane reacts with two equivalents of metallic sodium in ether ?


67) 2-Methylbutane on reaction with bromine in the presence of sunlight gives mainly


68) Ethylene can be prepared by electrolysis of an aqueous solution of


69) Propene on reaction with methylene iodide in presence of Zn - Cu couple gives


70) The alkene which on ozonolysis yields acetone only is


71) An alkene, obtained by the dehydration of an alcohol, (A), on ozonolysis gives two molecules of acetaldehyde for every molecule of alkene. The alcohol (A) is


72) Ethylene forms ethylene chorohydrin by the action of


73) The type of isomerism not exhibited by alkenes is


74) Addition of ICI on propene gives the product


75) Ethylene reacts with sulphur monochloride to give


76) The reaction of ethene with oxygen in presence of a silver catalyst gives


77) Addition of halogen acid occurs at slowest rate in


78) Propene on reaction with diazomethane in presence of UV radiations gives


79) The presence of unsaturation in organic compounds can be tested with


80) Reaction of HBr with propene in the presence of peroxide gives


81) Propane-1-ol can be prepared from propene by


82) A hydrocarbon reacts with hyochlorous acid to give 2-choroethanol. The hydrocarbon is


83) Which one of the following heptanols can be dehydrated to hept-3-ene only ?


84) Hydrolosis of ozonide of but-l-ene gives


85) Pent-1-ene with HCl gives


86) The product formed by the action of chlorine on ethene in saturated solution of KBr is/are


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


88) For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to


89) Lewsite is :


90) The conversation of 2,3-dibromobutane to 2-butene with Zn is


91) Which doesn't follow Markownikoff's rule ?


92) Dehydrohalogenation in presence of OH is correctly represented by


93) Which of the following requires free radical intermediates ?


94) Which of the following does not show geometrical isomerism ?


95) Among the following compounds which can be dehydrated very eaisly is


96) Acid catalysed hydration of alkenes except ethene leads to the formation of


97) Anti-Markownikoff's addition of HBr is not observed in


98) Baeyer's reagent is


99) 1-Chlorobutane on reaction with alcoholic potash gives


100) Ozonolysis of 2,3-dimethyl-1butene followed by reduction with zinc and water gives


101) In the presence of peroxide, hydrogen chloride and hydrogen iodide do not give anti Markownikoff's addition to alkenes because


102) The reaction of propene with HOCl proceeds via the addition of


103) The best method to perpare cyclohexene from cyclohexanol is by using


104) Which of the following reactions is shown by alkynes


105) Number of acidic hydrogen atom in
but-1-yne- is


106) By the action of hydrobromic acid on ethyne we get


107) Acetylene is prepared industrially by passing electric discharge through graphite electrodes in the atmosphere of


108) Acetylene can be converted to higher alkynes using the following sequence of reaction


109) Acetylenic hydrocarbons are acidic because


110) An anaesthetic naracylene is commercial name of


111) The gas which is used for artificial ripening of fruits is


112) The compound formed when silver powder is heated with chloroform


113) Acetylene gives


114) Tetrabromoethane on treatment with Zn gives


115) What is formed when calcium carbide reacts with heavy water


116) When acetylene is treated with HBr, the product is


117) In acetylene molecule, the two carbon atoms are linked by


118) Catalyst used in dimerisation of acetylene to prepare chloroprene is


119) Which of the following gives propyne on hydrolysis ?


120) In its reaction with silver nitrate acetylene shows


121) Which one of these will not react with acetylene ?


122) What is the product formed when acetylene reacts with hypochlorous acid ?


123) Identify the reagent from the following list which can easily distinguish between 1-butyne and 2-butyne


124) Which of the following species is most stable ?


125) Which of the following in an explosive ?


126) Among the following statements on the nitration of aromatic compounds, the false one is


127) Which among the following is the strongest ortho-para directing group ?


128) The correct order of reactivity towards electrophilic substitution is


129) The correct sequence of activating power of a group in benzene is


130) Among the following groups, which deactivates benzene ring for electrophilic substitution ?


131) In Etard's reaction toluene is oxidised to benzaldehyde using


132) Benzene is converted to toluene by


133) In the halogenation of aromatic nucleus, the halogen carrier, is used to generate the species


134) In nitrating mixture concentrated sulphuric acid is used


135) The nitro group in nitrobenzene is


136) The number of double bonds in BHC (gammexane) is


137) Benzene easily shows


138) Anhydrous aluminium chloride is used in Friedel Crafts reaction because it is


139) Which of the following is used in Friedel Crafts acylation reaction ?


140) When benzene is treated with CO and HCl in presence of anhydrous aluminium chloride, benzaldehyde is formed. This reaction is known as


141) Benzene is formed by the electrolysis of


142) In Friedel Crafts reaction benzene is


143) Which of the following conditions are suitable for preparing benzyl chloride from toluene


144) Which group is meta directing


145) Ozonolysis of benzene gives


146) Friedel Crafts reaction is not possible in


147) Which of the following compounds reacts slower than benzene in electrophilic bromination.


148) Which can be used for carrying out electrophilic aromatic substitution


149) Benzene is obtained by


150) Most common reactions of benzene and its derivatives are


151) Which of the following can not be used in Friedel Crafts reactions ?


152) The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzenes (II) and nitobenzene (III) is


153) What is the end product of nitration of toluene ?


154) Which of the following possesses the highest melting point ?


155) Benzene is obtained by fractional distillation of


156) The treatment of benzene with isobutene in the presence of sulphuric acid gives


157) The most reactive among the following towards sulphonation is


158) Which of the following species participate in sulphonation of benzene ring ?


159) Which one of these is not compatible with arenes ?


160) The compound prepared by a substitution reaction of benzene is


161) Gammexane is


162) Heating a mixture of sodium benzoate and soda lime gives


163) Benzene does not undergo addition reaction easily because


164) The bond order of individual carbon-carbon bonds in benzene is


165) Baeyar's reagent is


166) Lindane can be obtained by reaction of benzene with


167) Which of the following will be easily nitrated ?


168) In catalytic reduction of hydrocarbons which catalyst is mostly used


169) Position of double bond in alkenes can be identified by


170) Pure methane can be produced by


171) Propane cannot be prepared from which reaction ?


172) The highest boiling point is expected for


173) Which of the following compounds are not arrange in order of decreasing reactivity towards electrophilic substitution ?


174) Toluene on reaction with chlorine in presence of sunlight gives


175) Which of the following compound will give only acetaldehyde after ozonolysis ?


176) Propyne and propene can be distinguished by


177) Which is most sensitive towards addition reaction?


178) On monochlorination of 2-methylbutane the total number of chiral compounds formed is


179) When phenyl magnesiumbromide reacts with t-butanol, the product would be


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


181) Of the five isomeric hexanes, the isomer which can give can two monochlorinated compound is


182) Which of the following reactions will yield 2,2 -dibromopropane ?


183) Presence of a nitro group in a benzene ring


184) The hydrocarbon which can react with sodium in liquid ammonia is


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


186) A knocking sound is produced more in the engine when the fuel contains mainly:


187) Reaction of HBr with propene in presence of peroxides gives:


188) The reaction conditions used for converting 1,2-dibromopropane to propylene are


189) The relationship between acetylene and benzene is comparable to the relationship between propyne and


190) The ozonolysis of ethylene, acetylene and propylene respectively gives:


191) Alkyl halides react with dialkyl copper reagents to give


192) The gas which is used for the artificial ripening of fruits is:


193) Which of the following is produced when coal is subjected to destructive distillation?


194) Methyl bromide heated with zinc in closed tube produces:


195) The reaction of alkanes with halogen is explosive in the case of:


196) Which of the following is unsymmetrical alkene?


197) Which of the statement is wrong for alkanes?


198) Propane cannot be prepared from which reaction?


199) Nitrating mixture is


200) Which of the following is not a mixture of hydrocarbons?


201) Which of the following has the maximum heat of hydrogenation?


202) Position of double bond in alkenes is identified by


203) Which of the following reagent can distinguish between 1-butyne and 2-butyne?


204) Reaction of HBr with propene in the presence of peroxide gives


205) The middle oil fraction of coal-tar distillation contains:


206) Acrylic emulsion in paints is a polymer of:


207) An anaesthetic narcylene is commercial name of:


208) What volume of methane (NTP) is formed from 8.2 g of sodium acetate by fusion with sodalime?


209) When methyl iodide is treated with sodium in ethereal solution, it gives


210) 2-methylpentene 2 on ozonolysis will give:


211) 2-Hexyne gives trans-2-hexene on treatment with:


212) Which of the following will give three mono-bromo derivatives?


213) In a reaction if half of the double bond is broken and two new bonds are formed, this is a case of:


214) Which represents a cyclic alkane?


215) According to Huckel's rule an aromatic compound must possess


216) Acetylene gives:


217) 1,1,2,2-tetrabromoethane on heating with Zn powder in alcohol finally gives:


218) The carbide which reacts with water to form ethyne is


219) Which statement is not correct in case of ethane?


220) When ethyl chloride and alcoholic KOH are heated, the compound obtained is


221) Which of the following will react with sodium metal?


222) When the boiling point of the first ten normal alkanes are plotted, the graph looks like:


223) Which is generally used as reducing agent in organic chemistry?


224) Alkynes can be reduced to alkenes by hydrogenation in presence of:


225) Which reagent distinguishes ethylene from acetylene?


226) By heating tetraethyl ammonium hydroxide, the product formed are:


227) Addition of ICl on propene gives the product:


228) Which of the following alkenes gives on acetaldehyde on ozonolysis?


229) Direct fluorination of alkanes is not made because:


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


231) Which of the following is the predominant product in the reaction of HOBr with propene?


232) Acetylene is prepared industrially by passing electric discharge through graphite electrodes in the atmosphere of:


233) The reaction of an aromatic halogen compound with an alkyl halide in presence of sodium in ether is called


234) How many isomeric forms of pentane exist?


235) Alkanes mainly show reactions involving:


236) Ozonolysis of an organic compound A produces acetone and propionaldehyde in equimolar mixture. Identify A from the following compounds.


237) The compound that is most reactive towards electrophilic nitration is


238) One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is


239) The conversion of propene to propanol is … type of reaction.


240) An alkane of mol. weight 72 gives on monochlorination only one product. Name the alkane:


241) The number of disubstituted products of benzene is


242) Electrolysis of an aqueous solution of sodium acetate, yields


243) Propyne on passing through red hot copper tube forms


244) Among the following, the compound that be most readily sulphonated is


245) Propylene on hydrolysis with sulphuric acid forms


246) What is the product formed when acetylene reacts with hypochlorous acid?


247) Alkenes undergo


248) Polymer of propyen is:


249) Which of the following has the least octane number?


250) The tar which is used to make roads is a solid known as:


251) Thermal decomposition of alkanes in the absence of air is called


252) The conditions for aromaticity is


253) The highest boiling point is expected for


254) When butane-1 is mixed with excess of bromine, the expected reaction product is:


255) Propene on reaction with diazomethane in presence of UV radiations gives:


256) Both methane and ethane may be obtained by a suitable one-step reaction from


257) Iodination of alkane is made in presence of:


258) Pick out the wrong statement.


259) A hydrocarbon reacts with hypochlorous acid to give 2-chloroethanol. The hydrocarbon is:


260) The angle strain in cyclobutane is


261) Aromatization of n-heptane and n-octane gives respectively:


262) Which of the following organic compounds exhibit acidic character?


263) Sodium formate on heating with soda lime gives:


264) Which of the following can be used for preparation of propane?


265) The marsh gas detector used by miners works on the principle of:


266) The compound with highest boiling point.


267) The most stable conformation of chlorocyclohexane at room temperature is:


268) Acetylene is not used in making:


269) That acetylene is a linear molecule is shown by


270) Which of the following differs with the other three?


271) Which of the following reactions will yield, 2, 2-dibromopropane?


272) Which one of the following can distinguish propyne from propene?


273) The reaction of ethene with oxygen in presence of a silver catalyst gives:


274) Which of the following is Wurtz-Fittig reaction?


275) Ozonolysis can be used to detect:


276) In which of the following will Kharasch effect operate?


277) A lead compound known as….is used as anti-knock in petroleum industry to increase the efficiency of fuel consumption


278) Which of the following form alkynide?


279) Which of the following reagents when heated with ethyl chloride, forms ethylene?


280) Reduction of 2-methyl-1-bromopropane with metal and acid gives:


281) Dehydration of 2-butanol yield


282) Which statement is correct?


283) Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?


284) 2-chloro-3-methylbutane is treated with sodium in etherial solution, then it will give


285) The hydrocarbon which can react with sodium in liquid ammonia is


286) Which of the following is incorrect? The members of the homologous series of alkanes?


287) Ammoniacal cuprous chloride will give red precipitate with which one of the following?


288) Mustard gas is:


289) The structural formula of the compound which yields ethylene upon reaction with zinc:


290) An alkyne combines with a conjugated diene to give an unconjugated cycloalkadiene. The most likely title of this reaction is


291) The most important method of preparation of hydrocarbons of lower carbon number is:


292) The number of carbon atoms in hydrocarbons of kerosene is in the range of:


293) A mixture of 1-chlorobutane and 2-chlorobutane when treated with alcoholic KOH gives


294) An octane number 100 is given to:


295) When butene-1 is mixed with HBr, the major reaction product is:


296) The order of appearance of the following with rising temperature during the refining of crude oil is:


297) Cetane number of diesel fuel increases with the addition of:


298) Distillation of acetone with concentrated sulphuric acid gives


299) Soda lime is used extensively in decarboxylation reaction to obtain alkanes. Soda lime is:


300) Incomplete combustion of petrol or diesel oil in automobile engines can be best detected by testing fuel gases for the presence of:


301) Mustard gas is a


302) Which of the following is not true?


303) Action of RMg X with vinyl chloride gives:


304) Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?


305) A meta directing functional group is


306) Which one of the following compounds is prepared in the laboratory from benzene by a substitution reaction?


307) Only two isomeric monochloro derivatives are possible for:


308) Butene-1 may be converted to butane by reaction with


309) The reaction of toluene with chlorine in presence of ferric chloride gives predominantly


310) During Wurtz reaction, which of the following is sometimes also obtained because of decomposition of free radicals?


311) Decarboxylation of malonic acid gives:


312) Reactivity of tertiary H, secondary H and primary H towards elimination is:


313) 1-butyne on hydration gives


314) The most reactive halogen in the halogenation of alkanes is:


315) Indane is:


316) Which of the following cycloalkane gives open chain compound, when reacts with bromine?


317) The addition of HBr to an alkene in the presence of peroxide is the example of


318) On mixing a certain alkane with chlorine and irradiating it with UV light, it form one monochloro alkane. The alkane could be


319) Which of the following statements is true for ethane, ethene and acetylene?


320) On cracking petrol we get:


321) Methyl bromide is converted into ethane by heating it in ether medium with


322) The addition of oxygen gas to reaction mixture of chlorine and methane (photochemical chlorination):


323) Bacterial decomposition of cellulose material present in sewage water gives:


324) Meso-dibromobutane on debromination gives


325) Kolbe's synthesis of sodium salt of butanoic acid gives:


326) The compound formed when silver powder is heated with chloroform:


327) The reaction of toluene with chlorine in the presence of ferric chloride gives predominantly


328) Which of the following will yield trans product from butyne?


329) When sodium propionate is heated with soda-lime, the product formed is


330) Isopropyl bromide on Wurtz reaction gives


331) Which one of the following has the minimum boiling point?


332) The substance that would not at all be formed during the reaction of methane and chlorine in the presence of sunlight is:


333) When isopropyl magnesium iodide is treated with water, the product is:


334) Propyne on passing through red hot iron tube gives


335) n-hexadecane (cetane) has cetane number:


336) Acetylene does not react with


337) What is the molecular formula of the product formed when benzene is reacted with ethyl chloride in presence of anhydrous aluminium chloride?


338) A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon. The derivative is


339) By coaltar distillation which is not obtained?


340) The treatment of ethane with cold alkaline potassium permanganate produces


341) As compared to melting points of even carbon chain isomers, the melting points of odd carbon chain alkanes are:


342) Choose the correct statement


343) 2-hexyne can be converted to trans-2-hexene by the action of:


344) Which of the following will not produce ethane?


345) Which will not react with acetylene?


346) Ozonolysis of an organic compounds gives formaldehyde as one of the products. This confirms the presence of


347) Among the paraffins it is generally found that with an increase in the molecular weight:


348) Which of the following reactions can be used to prepare methane?


349) Household gas or liquefied petroleum gas (L.P.G.) mainly contains:


350) Which one of the following gives, on ozonolysis, both aldehydes and ketones?


351) Which among the following give alkanes on reduction?


352) Lewisite (a war gas) is an…….compound


353) Butyne-1 and butyne-2 can be distinguished by:


354) An isolated alkadiene is:


355) If a halogen compound contains OH group, will it be possible to carry out the Wurtz reaction?


356) Phenyl magnesium bromide reacts with methanol to give


357) Iso-octane is added to petrol:


358) When cyclohexane is poured on water, it floats, because:


359) Which of these will not react with acetylene?


360) The catalytic hydrogenation is more easier in case of which alkene?


361) Addition of hydrogen on C=C is called hydrogenation. Addition of halogen on C=C is called:


362) The synthetic gas is:


363) Gem dihalides on treatment with alcoholic KOH give


364) Acetylene and HCHO react in presence of copper acetylide catalyst to form


365) Decarboxylation of isobutyric acid leads to:


366) In the addition of HBr to propene in the absence of peroxides the first step involves the addition of:


367) Pure methane can be produced by


368) When a mixture of methane and oxygen is passed through heated molybdenum oxide, the main product formed is


369) Propyne and propene can be distinguished by


370) Conformation in molecules is due to:


371) The non-aromatic compound among the following is


372) Kerosene is a mixture of:


373) Which of the following alkenes is most stable?


374) What is obtained when chlorine is passed in boiling toluene and product is hydrolysed?


375) It is necessary to use…..in the iodination of alkane.


376) Ozonolysis of propyne gives:


377) Reactivity of alkenes towards HX decreases in the order:


378) 2-methylbutane on reacting with bromine in the presence of sunlight gives mainly


379) Which statement is correct?


380) An activating group


381) An alkyl bromide, RBr of molecular weight 151 is the exclusive product of bromination of which hydrocarbon?


382) The conversion of liquid hydrocarbon into a mixture of gaseous compounds by heat alone is known as:


383) Ethyl benzene cannot be prepared by


384) Silver acetylide when heated with HCl gives:


385) The addition of HCl to 3, 3, 3-trichloropropene gives


386) Sodium ethoxide is specific reagent for:


387) A fuel contains 25% n -heptane and 75% iso-octane. Its octane number is:


388) The greatest strain is involved in cycloalkane, when the bond angle is:


389) Which of the following will be obtained by the bromination of ethylbenzene in the presence of light?


390) Ethylene is used in making:


391) The main constituent of light oil fraction is:


392) The major product in the acid catalysed dehydration of 2-pentanol is:


393) Which gas is commonly used in welding?


394) The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are


395) Which is most acidic of the following?


396) Addition of HI on double bond of propene yields isopropyl iodide and not n-propyl iodide as the major product, because addition proceeds through:


397) Correct statement about 1,3-dibutene


398) Preparation of ethane by electrolysis of aqueous solution of potassium acetate is called


399) Acetylene reacts with hypochlorous acid to form


400) Dehydrohalogenation of 1,2-dibromobutane with alc. KOH gives:


401) Water can be added across a triple bond in the presence of


402) Both methane and ethane may be obtained in one step reaction from:


403) The product formed when acetylene is passed through red hot tube is:


404) Among the following statement on the nitration of aromatic compounds, the false one is


405) Which of the following compound is aromatic?


406) To prepare a pure sample of n-hexane using sodium metal as one reactant, the other reactant or reactants
will be:


407) Photochemical chlorination of alkane is initiated by a process of:


408) The electrolysis of aqueous solution of potassium succinate produces


409) The gas believed to be the cause of explosion in coal-mines or fire damp is:


410) Addition of HBr to propylene in presence of benzoyl peroxide, follows


411) 2-phenyl propene on acidic hydration gives,


412) Halogenation of alkanes is an example of:


413) The most stable isomer of 1,2-dichloroethane is:


414) Grignard's reagent gives alkane with:


415) The carbon-carbon bond length in benzene is


416) Electrolysis of a concentrated solution of sodium fumarate gives:


417) In order to overcome angle strain, cyclohexane acquires:


418) Ethane can be freed (isolated) from the impurity of ethylene by washing with:


419) Poisonous gases are:


420) A chlorohydrocarbon, named chlorodane is used especially as:


421) The highest boiling point is expected for


422) The addition of tetraethyl lead of petrol:


423) Which of the following reactions will give an alkyne?


424) Which one among the following is assigned an octane number of zero?


425) The process where straight run gasoline is cracked in order to increase octane number is called:


426) The treatment of aluminum carbide with water or dilute acid produces


427) When acetylene is passed through red hot iron tube, compound X is formed. Which one of the following reactions will yield X as the major product?


428) The major product formed when a 3, 3-dimethyl butan-2-ol is heated with concentrated sulphuric acid, is


429) Most of the hydrocarbons from petroleum are obtained by:


430) Cyclopentadienyl anion is


431) Ozonolysis of buta-1,3-diene gives:


432) Which is not true in the case of natural gas?


433) Wurtz reaction using bromoethane yields:


434) Which of the following compounds is not aromatic?


435) Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH solution gives


436) Toluene can be converted into benzaldehyde by oxidation with


437) The reagent used for dehydration is:


438) The chemicals and the reaction conditions required for the preparation of ethane are


439) Formation of alkane by the action of zinc on alkyl halide is called


440) Temperature of oxyacetylene flame is:


441) Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively


442) Hydrocarbon reacts with metal by displacing the H-atom is:


443) Petroleum is a mixture of:


444) The reduction of an alkyne to alkene using Lindlar catalyst result into


445) Which molecule will undergo radical formation oxidation reaction most readily?


446) Which of the following is expected to be aromatic?


447) Aniline is treated with a mixture of sodium nitrite and hypophosphorus acid, the product formed is


448) Hexachloroethane is also called


449) In presence of nickel cyanide, acetylene gives


450) Conjugated double bonds are present in:


451) Normal alkanes can undergo sulphonation if they contain:


452) The dehydrohalogenation of neopentyl bromide with alcoholic KOH gives mostly:


453) Which of the following liberates methane on treatment with water?


454) Which statement is correct?


455) The most stable conformational isomer of cyclohexane is:


456) Baeyer's reagent is used in the laboratory for:


457) Which of the following is elimination reaction?


458) Product formed on electrolysis of potassium salt of fumaric and maleic acid is


459) The strongest ortho/para directing group is


460) When chlorine is passed through warm benzene in presence of the sunlight, the product obtained is


461) The lowest possible alkane with ethyl group as substituents possesses mol. mass equal to:


462) The reagent (s) for the following conversion, is/are


463) The number of conformation (s) for ethane is/are:


464) The test for unsaturation is confirmed by the decolourisation of which of the following?


465) Which does not react with chlorine in dark?


466) The ozonolysis of isobutene gives:


467) Which compound on reductive ozonolysis forms only glyoxal?


468) The catalyst used in the manufacture of polythene by Ziegler method is:


469) 1,3-butadiene has:


470) Chloroform, on warming with Ag powder gives


471) By Wurtz reaction, a mixture of methyl iodide and ethyl iodide gives


472) Acetylene on passing into excess of HOCI solution forms:


473) Ethylene forms ethylene chlorohydrin by the action of:


474) Which one of the following has the smallest heat of hydrogenation per mole?


475) Which of the following characteristic apply both to ethane and ethyne?


476) Conjugated double bond is present in:


477) The reactivities of ethane, ethylene and acetylene are of the order


478) Which is not linked with methane?


479) Wet ether is not used as a solvent in Wurtz reaction, because the water present in it


480) Out of the following fractions of petroleum the one having the lowest boiling point is:


481) Acetylene on reacting with hypochlorous acid gives:


482) Which one of the following compounds will react with methyl magnesium iodide?


483) When HCI gas is passed through propene in the presence of benzoyl peroxide, it gives:


484) Hydrocarbon which is liquid at room temperature is


485) Incorrect name of an alkyne is:


486) Alkyl halides react with dialkyl copper reagents to give


487) Paraffin dissolves in:


488) Which cannot be prepared by Kolbe's electrolytic reaction using single salt?


489) Which of these does not follow anti-Markownikoff's rule?


490) An alkyl bromide (X) reacts with Na to form 4, 5-diethyl octane. Compound (X) is:


491) To avoid lead pollution, a new anti-knock compound is used. It is:


492) Angle strain in cyclopropane is


493) Which of the following compounds cannot be prepared singly by the Wurtz reaction?


494) Which statement is false?


495) The presence of unsaturation (olefinic or acetylinic bond) in an organic compound can be tested with:


496) A mixture of ethyl iodide and n-propyl iodide is subjected to Wurtz reaction. The hydrocarbon that will not be formed is:


497) Which of the following reacts with benzene in presence of anhydrous aluminium chloride and forms acetophenone?


498) Which of the following species is aromatic?


499) Compound which gives acetone on ozonolysis


500) Alkynes occur in nature in the:


501) Which of the following will have least hindered rotation about carbon-carbon bond?


502) Wurtz reaction converts alkyl halide into alkane when it is made to react with


503) Polyethylene is a resin obtained by polymerization of:


504) Which of the following are produced from coaltar?


505) The reduction of an alkyne to alkene using lithium metal in liquid ammonia as solvent results into


506) Propene on reaction with hypochlorous acid to give


507) A mixture of nitrogen and acetylene, on passing electric spark through it gives:


508) Which one of these is not true for benzene?


509) Presence of a nitro group in a benzene ring


510) Hydrocarbon liquid at STP is:


511) In the series, ethane, ethene and ethyne, the C-H bond energy is


512) The shape of 2-butene is:


513) The substance used as an anti-knock compound is:


514) Petroleum refining is:


515) Zinc-copper couple that can be used as a reducing agent is obtained by:


516) A solution of sodium salt of fatty acid was electrolysed during Kolbe's reaction. The solution left after electrolysis is:


517) Kolbe's synthesis on electrolysis of sodium salt of butanoic acid gives:


518) The neutral wax called Ozokerite found near petroleum well is a mixture of:


519) Which among the following is aromatic?


520) Which among the following are used as catalyst in cracking?


521) The general formula of a cycloalkane is


522) Which of the following alkanes can be easily sulphonated?


523) The octane number of any fuel increases with:


524) The reaction of propene with HOCl proceeds via the addition of


525) The chemical reactivity of ethylene is due to:


526) Product formed when 1-butene is subjected to HBr in the presence of peroxide:


527) Petrol or gasoline used as an automobile fuel is a mixture of:


528) The major component of L.P.G. is:


529) Carbon black, used in making printing ink is obtained by the oxidation of:


530) Gasoline is:


531) A hydrocarbon reacts with HI to give (X) which on reacting with aqueous KOH forms (Y). Oxidation of (Y) gives 3-methyl-2-butanone. The hydrocarbon is:


532) Pure acetylene has sweet ethereal smell while impure smells like garlic due to presence of:


533) An alkyl halide by formation of its Grignard reagent and heating with water yields propane. What is the original alkyl halide?


534) Which of the following compounds react with HBr obeying Markownikoff's rule?


535) Liquid hydrocarbon can be converted to a mixture of gaseous hydrocarbon by:


536) Cyclobutadiene is said to be


537) Acetylene reacts with hypochlorous acid to form


538) To enable easy detection of gas leakage from cylinders, the substance added to L.P.G. is:


539) Octane no. of 2,3,3-trimethylbutane has been assumed to be:


540) Which of the following compounds can form metallic derivatives?


541) Octane no. of a fuel can be increased by:


542) Catalyst used in dimerization of acetylene to prepare chloroprene is:


543) Naphalene is an example of


544) Benzene can react with


545) In which reaction addition takes place according to Markownikoff's rule?


546) Paraffin wax is:


547) Which of the following is called Marsh gas?


548) Which can be easily oxidized?


549) n-butane and isobutene, which have same number of hydrogen and carbon atoms in their molecules, boil at different temperatures because:


550) Common oxidizing agents used in organic chemistry are:


551) Acetylenic hydrocarbons are acidic because:


552) Butene -1 may be converted to butane by the reaction with:


553) Number of acidic hydrogen atom in butyne-1 is:


554) Propene on reaction with methylene iodide in presence of Zn-Cu couple gives:


555) The carbon-carbon bond distance in benzene is


556) Method of converting high boiling hydrocarbons into low boiling hydrocarbons is called:


557) The mechanism of Wurtz reaction involves:


558) The most important energy yielding constituent in biogas is:


559) PVC is a polymer of:


560) The flash point in India is fixed at:


561) Lindlar's catalyst is:


562) The order of relative acidic strengths of water, ethyne and propyne is:


563) Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces:


564) Ethylene reacts with slphur monochloride to give:


565) Ethylene may be prepared by the dehydration of:


566) Petroleum is formed by the chemical changes in:


567) Common dehydrating agents for alkanes are:


568) The most stable conformation of butane is:


569) The product of acid catalysed hydration of 2-phenyl propene is:


570) Benzene reacts with chlorine in sunlight to give a final product


571) The overlapping of orbitals in benzene is of the type


572) The product obtained when methyl magnesium bromide reacts with methyl alcohol is:


573) Which of the following have delocalised electron?


574) Which statement is correct?


575) Ease of sulphonation of alkanes is:


576) n-propyl bromide on treating with alcoholic KOH produces


577) Fischer-Tropsch process is used in the manufacture of:


578) 2-methylpropene is isomeric with butane-1. They can be distinguished by:


579) The simplest alkyne is:


580) An alkene, obtained by the dehydration of an alcohol (A), on ozonolysis gives two molecules of acetaldehyde for every molecule of alkene. The alcohol (A) is:


581) Which of the following annulenes is anti aromatic?


582) Which statement is correct?


583) Which compound does not decolourize bromine dissolved in carbon tetrachloride?


584) What would be the product formed when 1-bromo-3-chlorocyclobutane reacts with two equivalents of metallic sodium in ether?


585) Octane number 116 is given for:


586) Which of the following statements is incorrect?


587) Formation of ethylene from ethyl bromide is a case of:


588) The most stable alkene is,


589) Ethylene can be prepared by electrolysis of an aqueous solution of:


590) Reactive species in halogenation of benzene in cold and dark


591) An organic alkadiene on reductive ozonolysis produces
(i) acetaldehyde
(ii) acetone
(iii) 2-methylpropane-1, 3-dial
The formula of alkadiene will be


592) Synthetic petrol and kerosene can be obtained by passing……under heat and pressure over coal


593) A hydrocarbon containing 2 carbon atoms give Sabatier and Senderen’s reaction but does not give precipitate with ammoniacal silver nitrate solution. The hydrocarbon in question is:


594) Acetylene can be converted to higher alkyne using the following sequence of reactions:


595) Which of the following statement is correct?


596) The correct boiling point order for corresponding hydrocarbons is:


597) Electrolysis of cold concentrated aqueous solution of potassium methyl succinate yields:


598) Alkyl halides get converted to alkenes through:


599) Cycloalkanes are isomeric with


600) Which gives only one monosubstitution product on chlorination?


601) The presence of the chlorine atom on benzene ring makes the second substituent enter at a position


602) Addition of bromine to 1,3-butadiene gives:


603) A Wittig reaction with an aldehyde gives


604) Ethylene di bromide on heating with metallic sodium in ether solution yields


605) When alcoholic solution of ethylene dibromide is heated with granulated zinc, the compound formed is:


606) Octane number is:


607) When an aqueous solution containing sodium acetate and sodium propionate is electrolysed we get:


608) Which one of the following methods is neither meant for the synthesis nor for separation of amines?


609) Vic-dihalide on treatment with zinc dust gives:


610) Which will give cyclooctyne when treated with base?


611) What are the products obtained upon the ozonolysis of pent-2-ene?


612) Addition of halogen acid occurs at slowest rate in:


613) The Markownikoff's rule is the best applicable to the reaction between


614) Which of the following acid reacts to reverse the Markownioff's rule?


615) The addition of HOCl on alkenes in presence of strong acids to form halohydrins proceeds via formation of:


616) On treatment with chlorine in presence of sunlight, toluene gives the product


617) Ethylene is used for:


618) Statement 1: Acetylene forms acetylide but ethylene does not.
Statement 2: Acetylene is lighter than air


619) Statement 1: Acetylene is more reactive then ethylene.
Statement 2: The acetylene, there is greater strain and hence is reactive. The strain disappears when addition occurs.


620) Statement 1: 2,3-dimethyl but 2 ene is more stable than but 2 ene.
Statement 2: Tweleve hyper conjugation structure can be written for 2,3 dimethyl but 2ene while but 2 ene has only six.