Practice Test


Q1) Which pair represents chain isomers? Show Answer


Q2) Which are isomers? Show Answer


Q3) Amines exhibit Show Answer


Q4) The isomerism exhibited by n - butyl alcohol and iso - butyl alcohol is Show Answer


Q5) Compounds having same molecular formula but different properties are called Show Answer


Q6) An alkane forms isomers if the number of carbon atoms is. Show Answer


Q7) n - Propyl alcohol and iso - propyl alcohol are Show Answer


Q8) Isomerism exhibited by acetic acid methyl formate is Show Answer


Q9) Aldehydes are isomeric with ........ of same molecular formula Show Answer


Q10) The number of isomeric xylenes is Show Answer


Q11) The type of isomerism observed in urea molecule is Show Answer


Q12) Can homologues be isomers? Show Answer


Q13) Which of the following statements is necessarily true in the case of isomeric organic compounds? Show Answer


Q14) Isomerism among compounds due to the migration of proton is known as Show Answer


Q15) The tautomeric form which is less stable is called Show Answer


Q16) Acetone and propen - 2 - ol are Show Answer


Q17) Vinyl alcohol and acetaldehyde are Show Answer


Q18) o - hyroxytoluene and benzyl alcohol are Show Answer


Q19) Cyclobutane and butene 1 are Show Answer


Q20) The number of possible isomers of a disubstituted benzene is Show Answer


Q21) Among the following the one which does not exhibit functional group isomerism is Show Answer


Q22) Buta -1, 3 - diene and but - 2 - yne are Show Answer


Q23) The compound which forms one monochloro product when treated with chlorine is Show Answer


Q24) Nitroethane can exhibit one of the following kind of isomerism Show Answer


Q25) Cyanides and isocyanides are isomers of the type Show Answer


Q26) Isomers of propionic acid are Show Answer


Q27) 1 - Chloropropane and 2 - chloropropane are Show Answer


Q28) Tautomerism is exhibited by Show Answer


Q29) Which of the following is an isomers of propanal? Show Answer


Q30) Which of the following is not isomeric with diethyl ether? Show Answer


Q31) In the Keto - enol tautomerism of dicarbonyl compounds the enol form is preferred in contrast to the Keto form, this is due to Show Answer


Q32) Which are isomers? Show Answer


Q33) Which of the following compounds will show metamerism? Show Answer


Q34) An isomer of ethanol is Show Answer


Q35) The enolic form of acetone contains. Show Answer


Q36) Keto - enol tautomerism is observed in Show Answer


Q37) Optical isomerism arises due to the presence of Show Answer


Q38) The optically active compound is Show Answer


Q39) 2 - Methylpenta - 2, 3 - diene is achiral because it has Show Answer


Q40) The angle of rotation of plane of polarised light depends upon Show Answer


Q41) The racemisation of optically active compounds is driven by Show Answer


Q42) Meso - tartaric acid is optically inactive due to the presence of Show Answer


Q43) The production of an optically active compound from a symmetric molecule without resolution is termed Show Answer


Q44) The process of separation of racemic mixture into d - and l - enantiomers is called Show Answer


Q45) Dichloroethylene shows Show Answer


Q46) Which of the following may exist as enantiomorphs? Show Answer


Q47) Which of the following is optically active? Show Answer


Q48) A compound contains 2 dissimilar asymmetric carbon atoms. The number of optically active isomers is Show Answer


Q49) Which of the following structures permits cis-trans isomerism ? Show Answer


Q50) Geometrical isomerism is caused Show Answer


Q51) An optically active compound is Show Answer


Q52) The maximum number of stereoisomers possible for 3-hydroxy - 2 - methylbutanoic acid is Show Answer


Q53) Which of the following compounds can exhibit optical isomerism ? Show Answer


Q54) Geometrical isomerism can exist only when the molecule Show Answer


Q55) Number of possible isomers of glucose are Show Answer


Q56) Which of the following does not show stereoisomerism Show Answer


Q57) Two geometrical isomers are given by the following compound Show Answer


Q58) Maleic and fumaric acids are Show Answer


Q59) The change in optical rotation with time of freshly prepared solution of sugar is known as Show Answer


Q60) d- Tartaric acid and l - tartaric acid are
Show Answer


Q61) Which of the following acids shows stereoisomerisms ? Show Answer


Q62) Which of the following would show configurational enantiomorphism. ? Show Answer


Q63) Optically active isomers are also called Show Answer


Q64) Which class of compounds can exhibit geometrical isomerism ? Show Answer


Q65) The arrangement of atoms that characteristics a particular stereoisomer is called Show Answer


Q66) The reason of the loss of optical activity of lactic acid when OH group is changed by H, is that Show Answer


Q67) Which is incorrect about enantiomorphs ? Show Answer


Q68) Compounds whose molecules are super imposable on their mirror images even though they contain asymmetric carbon atoms or chiral centres are known as Show Answer


Q69) A racemic mixture is a mixture of Show Answer


Q70) Isopentane can form four Isomeric monobromo derivatives. How many of them are optically active ? Show Answer


Q71) Lactic acid shows optical activity in Show Answer


Q72) Which of the following compounds exhibits geometrical isomerism ? Show Answer


Q73) Which one of the marked carbon is the asymmetric one? Show Answer


Q74) Eclipsed and staggered forms of n-butane are called a pair of Show Answer


Q75) The least energetic conformation of cyclohexane is Show Answer


Q76) Which one of the following is the most stable structure of cyclohexatriene ? Show Answer


Q77) In butane, which of the following form has the lowest energy ? Show Answer


Q78) Diastereomers can be separated by Show Answer


Q79) Which type of strain is present in fully eclipsed conformation of butane Show Answer


Q80) Stereoisomerism can be exhibited by compounds having Show Answer


Q81) Which of the following compound is not chiral ? Show Answer


Q82) Which is the chiral molecule ? Show Answer


Q83) A molecule is said to be chiral if it Show Answer


Q84) The chiral compound is Show Answer


Q85) Which of the following will show geometrical isomerism ? Show Answer


Q86) Benzaldoxime exists in how many forms ? Show Answer


Q87) The geometrical isomerism is shown by Show Answer


Q88) R and S pairs of enantiomers differ from one another in Show Answer


Q89) Which of the following pairs of compounds are enantiomers ? Show Answer


Q90) Which of the following is an optically active compound ? Show Answer


Q91) Which of the following exhibit zero dipole moment ? Show Answer


Q92) The compound having highest dipole moment is Show Answer


Q93) Which of the following Fischer's projection formula is identical to D-glyceraldehyde ? Show Answer


Q94) What is the order of stability for
I. 1 - butene
II. cis - 2 - butene
III. trans - 2 - butene? Show Answer


Q95) The compound without a chiral atom is Show Answer


Q96) Geometrical isomerism is shown by Show Answer


Q97) Which one of the following compounds will not exhibit optical isomerism ? Show Answer


Q98) The least number of carbon atoms in alkane forming optical isomer is Show Answer


Q99) Which of the following compounds will exhibit geometrical isomerism ? Show Answer


Q100) An organic compound will show optical isomerism if Show Answer


Q101) Optically active isomers but not mirror images are called Show Answer


Q102) Which of the following molecule contains asymmetric carbon atom ? Show Answer


Q103) Geometrical isomers differ in Show Answer


Q104) Which of the following does not show geometrical isomerism ? Show Answer


Q105) A similarity between optical and geometrical isomerism is that Show Answer


Q106) Which of the following compounds is not chiral ? Show Answer


Q107) Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is Show Answer


Q108) Which of the following has least hindered rotations carbon-carbon bond ? Show Answer


Q109) Isomers which can be interconverted through rotation around a single bond are Show Answer


Q110) An organic molecule necessarily shows optical activity if it Show Answer


Q111) The number of possible enantiomeric pairs that can be produced during monochlorination of 2-methylbutane is Show Answer


Q112) The optically active trataric acid is named as D-(+)-tartaric acid because it has a positive Show Answer


Q113) Which of the following exhibits stereoisomerism Show Answer


Q114) Which of the following compounds will exhibit geometrical isomerism ? Show Answer


Q115) Which of the following has the lowest dipole moment ? Show Answer


Q116) An enantiomerically pure acid is treated with a racemic mixture of an alcohol having one chiral carbon. The ester formed will be Show Answer


Q117) Which of the following statements is not true about enantiomers Show Answer


Q118) Rotation of plane polarised light can be measured by Show Answer


Q119) How many chiral isomers can be drawn from 2-bromo-3chorobutane ? Show Answer


Q120) Increasing of order of stability among the three main conformations ( i.e. eclipse, anti, gauche ) of 2 - fluroethanol is Show Answer


Q121) Which one of the following conformations of cyclohexane is chiral ? Show Answer


Q122) Which of the following molecules is expected to rotate the plane-polarised light? Show Answer


Q123) The alkene that exhibits geometrical isomerism is Show Answer