Practice Test

Q1) Which of the following is not an organic compound? Show Answer

Q2) The first organic compound ever prepared in laboratory from elements is Show Answer

Q3) Compounds having the same molecular formula but differing in their structure are called as Show Answer

Q4) The ability of carbon atom to combine with one another to form long chains, branched chains and rings is known as Show Answer

Q5) Fuel used in automobiles is a mixture of Show Answer

Q6) Which of the following is not a petroleum product? Show Answer

Q7) Common element in all the organic compounds other than hydrogen is Show Answer

Q8) Which of the following statements is wrong? Show Answer

Q9) Which of the following elements forms the largest number of compounds? Show Answer

Q10) Which of the following is not the criteria for purity of a substance? Show Answer

Q11) Sugar is obtained from its saturated solution by Show Answer

Q12) Benzoic acid can be purified by Show Answer

Q13) Organic liquids like acetone is purified by _____ methods. Show Answer

Q14) Extraction of oils and fats from seeds and essence from flowers is done by using Show Answer

Q15) To purify mixtures of organic compounds _____ method is used. Show Answer

Q16) Sodium chloride crystals are Show Answer

Q17) Alum crystals are Show Answer

Q18) Copper sulphate crystals are Show Answer

Q19) Quartz crystals are Show Answer

Q20) The process of obtaining a solid in a pure crystalline form, from solution is known as Show Answer

Q21) The process ______ is used to separate two or more solids which are soluble in a given solvent Show Answer

Q22) Urea melts at _____ and acetanilide melts at 387 K. Show Answer

Q23) The soluble solids and miscible liquids are separated by Show Answer

Q24) Process used for the separation of compounds from the mixture of two or more miscible liquids having different boiling points is called Show Answer

Q25) Separation of bibary mixture of acetone and benzene is done by various types of Show Answer

Q26) The purity of crystals can be checked by determining its Show Answer

Q27) A crystalline substance is that Show Answer

Q28) Boiling point of a liquid depends upon Show Answer

Q29) In the detection of melting point, thermometer along with the capillary containing the substance is placed in Show Answer

Q30) When undissolved solid is in contact with its solution, the supernatant liquid is called Show Answer

Q31) To determine the melting point, powdered substance is filled in Show Answer

Q32) To determine the boiling point, powdered liquid is filled in Show Answer

Q33) The two solids of variable solubilities are separated by the process of Show Answer

Q34) In Lassaigne method, the elements of the organic compound are fused with metallic Show Answer

Q35) The presence of nitrogen in an organic compound is confirmed when the complex form has Show Answer

Q36) The formation of ______ precipitate which is insoluble in ammonium hydroxide confirms the presence of iodine Show Answer

Q37) In Lassaigne method, the treatment of sodium fusion extract with sodium niroprusside produces violet colour which indicates the presence of Show Answer

Q38) _____ is usually detected from the chemical properties of the compound Show Answer

Q39) ______ method is not applicable to compounds containing nitrogen in the form of nitro and azo group Show Answer

Q40) Carius method is used for the estimation of fluorine as ______ is water soluble. Show Answer

Q41) In the Kjeldahls method, nitrogen in the organic compound is converted to Show Answer

Q42) 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) Show Answer

Q43) 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 Show Answer

Q44) 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 Show Answer

Q45) 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 Show Answer

Q46) Dumas method is used for estimation of Show Answer

Q47) ______ has a linear structure due to sp hybridization of carbon Show Answer

Q48) Bond enthalpy and bond length in organic compounds are influenced by Show Answer

Q49) Aromatic compounds contain atleast one aromatic ring which resembles________ in their chemical behaviour Show Answer

Q50) The chemical properties of an organic compound are characterizes by its Show Answer

Q51) The homologous series consist of homologues which are arranged in the increasing order of their Show Answer

Q52) Which of the following is not a cyclic compound? Show Answer

Q53) Which of the following names is not correct in the IUPAC system of nomenclature? Show Answer

Q54) The compound having one isopropyl group is Show Answer

Q55) Which one of the following is not an alcohol? Show Answer

Q56) Which of the following compounds does not contain a C =O bond? Show Answer

Q57) The effect in which the displacements of electrons are temporary is called Show Answer

Q58) The phenomenon in which none of the structure describes most of the properties of the compound is termed as Show Answer

Q59) The number of contributing resonance structure contributes to Show Answer

Q60) In the '' no bond'' resonance structures carbon - carbon bond has _____ character Show Answer

Q61) Isopropyl radical has ______ hyperconjugation structures. Show Answer

Q62) The process of breaking or cleavage of covalent bond is known as Show Answer

Q63) Homolysis also occurs in the presence of catalyst such as Show Answer

Q64) The species in which carbon atom possesses a octet of electrons and a negative charge is called Show Answer

Q65) Stability of carbocation increases as the number of _____ substituents bonded to positively charged carbon atom increases Show Answer

Q66) Carbocations are______ and acts as a ______ Show Answer

Q67) Addition reaction is not shown by Show Answer

Q68) Which of the following is an example of elimination reaction? Show Answer

Q69) Purification of aniline and nitrobenzene can be done by ______ method Show Answer

Q70) Monoclinic sulphur has _______ crystals Show Answer

Q71) Copper sulphate crystal are of ______ colour Show Answer

Q72) Non - volatile soluble Impurities can be removed from a liquid by the process of Show Answer

Q73) The smallest ratio which shows the number of atoms of each element in a molecule of a compound is the Show Answer

Q74) In Lassaigne method, the presence of ______ is confirmed, if the white precipitate is soluble in ammonium hydroxide Show Answer

Q75) Homologues differ in molecular weight by Show Answer

Q76) Identify the bond formed which is polar in nature Show Answer

Q77) Which of the following carbocation has the least stability? Show Answer

Q78) The free radicals resulting from the cleavage of a bond are Show Answer

Q79) The general formula for an ether is
Show Answer

Q80) The general formula of a carboxylic acid is
Show Answer

Q81) The general formula of an ester is
Show Answer

Q82) ______ is filled in U-tube to absorb water from the organic mixture Show Answer

Q83) Molecular formula of benzene is Show Answer

Q84) In the Dumas method for the estimation of nitrogen, the gas collected in nitrometer is Show Answer

Q85) 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 Show Answer

Q86) 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 Show Answer

Q87) Find the empirical formula of the compound which contains C = 16.271 %, H = 0.677 % and Cl = 72.203 % Show Answer

Q88) The angle between the four valencies of carbon is Show Answer

Q89) In the homologous series, the successive members differ from each other in molecular formula by Show Answer

Q90) Which of the following is methanol? Show Answer

Q91) Which of the following is butan - 2 -ol? Show Answer

Q92) Which one of the following could be a cyclic alkane? Show Answer

Q93) Identify the electron withdrawing group from the following Show Answer

Q94) Which of the following carbocation wil be the most stable? Show Answer

Q95) Which of the following species does not act as a nucleophile? Show Answer

Q96) Identify the molecule which is NOT a nucleophile from the following Show Answer

Q97) Which of the following series contains only nucleophiles? Show Answer

Q98) Which of the following species has electron releasing (or + I inductive) effect? Show Answer

Q99) Which of the following species is not an electrophile? Show Answer

Q100) Which of the following is an electrophile? Show Answer

Q101) Friedrich wohler synthesized urea by heating a mixture of Show Answer

Q102) 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? Show Answer

Q103) Which is the structural formula for 3 - ethyl, 2 - methylhex - 1 -ene? Show Answer

Q104) Which is the structural formula of 1, 2, 3 - propanetriol? Show Answer

Q105) The name of some compounds are given , which one is not in IUPAC system ? Show Answer

Q106) Which is 1, 1- dimethylcyclohexane ? Show Answer

Q107) Which is 1, 1- dimethylcyclobutane ? Show Answer

Q108) Which of the following is hexan - 2 - ol ? Show Answer

Q109) Which of the following is 4-methylpentan-2-ol ? Show Answer

Q110) Which of the following is 2-methylpentan-3-ol ? Show Answer

Q111) Which of the following is 4-methylpentan-1-ol ? Show Answer

Q112) Which of the following is a cycloalkane ? Show Answer

Q113) Which is 1-Bromo-3-chloro-2-methylpropane? Show Answer

Q114) Which is 1, 1- Dichlorobutane ? Show Answer

Q115) Which structure below represents a ketone ? Show Answer

Q116) Which structure below represents an aldehyde ? Show Answer

Q117) Which structure below represents an ether ? Show Answer

Q118) The structure of 4 methyl - 2 - penten - 1 - ol is Show Answer