Kota Academy Karad Chemistry - Isomerism
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1 Kota cademy Karad 1. Which of the following compounds exhibit optical isomerism : () C C C () C CC (C) C C C (D) C CC. C 7 9 N has how many isomeric forms that contain a benzene ring : () 4 () (C) 6 (D) 7. Which of the following compounds is not chiral : () DC C C () C C CD (C) C CDC C (D) C CC D 4. Number of structural isomers of C 4 10 are : () () 6 (C) 7 (D) 10. The isomerism exhibited by alkyl cyanide and alkyl isocyanide is : () Functional () Positional (C) Tautomerism (D) Metamerism 6. Which of the following will have geometrical isomers : () Methylpropene () ut ene (C) ut 1 ene (D) Propene 7. Tautomerism is exhibited by : () (C ) CN () (C ) N (C) R CN (D) RC N 8. ow many primary amines are possible for the formula C 4 11 N : () 1 () (C) (D) 4 9. Diethyl ether and methyl n propyl ether are : () Position isomers () Functional isomers (C) Metamers (D) Chain isomers 10. n propyl alcohol and isopropyl alcohol are examples of : () Position isomers () Chain isomerism (C) Tautomerism (D) Geometrical isomerism 11. ow many isomers are possible for the alkyl group C 4 9 : () () (C) 4 (D) 1. Which of the following pair shows isomerism : () C and C () C C and C (C) C 6 6 and C 8 (D) C 4 and C 6 1. Geometrical isomerism is possible in case of : () Pent ene () Pentane (C) Ethene (D) Propene 14. The isomerism that arises due to restricted rotation about carbon carbon double bond is called: () Geometrical isomerism () ptical isomerism (C) Tautomerism (D) Conformational isomerism 1. The type of isomerism exhibited by maleic and fumaric acid is : () Functional isomerism () ptical isomerism(c) Cis trans isomerism(d) Position isomerism 16. mixture of equimolecular amount of enantiomorphs is known as : () tautomeric mixture () racemic mixture (C) n optically inactive mixture (D) zeotropic mixture 17. Meso tartaric acid is optically inactive due to the presence of : () Geometrical isomerism () Two chiral carbon atoms (C) Molecular symmetry (D) External compensation 18. The number of possible secondary amine of formula C 4 11 N is : () 1 () (C) (D) C 6 C N and C 6 N C exhibit which type of isomerism : () Position () Functional (C) Dextroisomerism (D) Geometrical isomerism 0. Which of the following will show geometrical isomerism : () () C (C) C C (D) C C C C C C C
2 Kota cademy Karad 1. Keto enol tautomerism is observed in : () C6 C () C6 C C (C) C6 C C6 (D) ll of these. Which type of isomerism is shown by pentanone : () Chain isomerism () Position isomerism (C) Functional isomerism (D) ll of these. Methylpentane and Methylpentane are... isomers : () Chain () Position (C) Functional (D) Metamers 4. Functional isomers of alkadiene is : () lkyne () Cycloalkene (C) lkene (D) 1 & both. Compound C 4 11 N can exhibit... isomerism : () Position () Functional (C) Metamerism (D) ll of these 6. compound has chiral carbon atoms. The number of possible optical isomers it can have is : () () (C) 8 (D) 4 7. Geometrical isomerism can be shown by : () >< () >C=N (C) N=N (D) ll 8. Isopentane can form four isomeric bromo derivatives. ow many of them are optically active: () 1 () (C) (D) None 9. Find the non staggered form (s) of ethane : () () (C) (D) None 0. Possible number of disubstituted benzene isomers is : () 1 () (C) (D) 4 1. What should be the minimum number of carbon atoms present in an ether to exhibit chain isomerism: () () (C) 4 (D). Which of the following statements is not correct : () Carboxylic acids can exhibit positional isomerism () lkynes can exhibit positional isomerism as well as geometrical isomerism (C) Cycloalkanes and alkenes having same number of carbon atoms are functional group isomers (D) ll of the alkenes cannot show chain isomerism. Which of the following is not a fucntional group isomer of ethyl acetate : () Isobutyric acid (), utanediol (C) ydroxybutanal (D) 4 ydroxybutanone 4. Which of the following types of isomerism cannot be exhibited by the members of alkene family: (a) Chain isomerism (b) Positional isomerism (c) Metamerism (d) Geometrical isomerism (e) Functional Group isomerism (f) Tautomerism () d, f () a, b, c (C) c, d, e (D) c, e. Tautomerism will not be shown by : () Cyclohexanone () Propionaldehyde (C) cetophenone (D) enzophenone 6. ow many carbon atoms are present in lowest possible alkane which can exhibit enantiomerism: () () 6 (C) 8 (D) 7
3 Kota cademy Karad 7. compound whose molecule is non-superimposable on its mirror image inspite of the presence of chiral centres is called : () Diastereomer () Meso compound (C) n enantiomer (D) threo enantiomer 8. mong the following structures which one is called erythro isomer : (a) (b) () a and b () nly b (C) nly a (D) nly c 9. The pair of structure given below represent : Me and Me () Enantiomers () Conformers (C) Position isomers (D) omologues 40. Which of the following represents E isomer : () C C (C) C (c) r () C C C C C (D) C C C 41. C The compound C C C shows : C () ptical isomerism () Geometrical isomerism (C) Metamerism (D) ptical & Geometrical isomerism 4. C C and C C 7 exhibit which type of isomerism : () Functional isomerism () Tautomerism (C) Geometrical isomerism (D) Metamerism 4. Examine following three pairs of possible isomers : C C C C C C C C (ia) (ib) (iia) (iib) (iiia) (iiib) State whether the above pairs represent identical compounds or different isomers : () ll three pairs represent different compounds () (ia) and (ib) are identical; (iia) and (iib) are identical; and (iiia) and (iiib) are identical (C) (ia) and (ib) are isomers; (iia) and (iib) are identical; and (iiia) and (iiib) are isomers (D) (ia) and (ib) are identical; (iia) and (iib) are identical; and (iiia) and (iiib) are isomers 44. Which of the following statements are true : (a) Isomers are the compounds having the same molecular formula but different structural formula (b) utyraldehyde and Isobutyraldehyde are chain isomers (c) omologues are not isomers (d) Propanoic acid is a functional isomer of ethyl methanoate The correct answer is : () only a and b () only b and d (C) only c (D) ll
4 Kota cademy Karad 4. The number of asymmetric carbon atoms and the number of optical isomers in C (C) C, are respectively : () and 4 () 1 and (C) and 4 (D) and 46. If optical rotation produced by the compound (a) is º, then that produced by the compound (b) is : 47. and are called as : () Position isomers () Chain isomers (C) Functional isomers (D) Ring chain isomers 48. & show isomerism : () Chain () Position (C) Functional (D) None of these 49. Which of the following pairs consist of non-isomeric compounds : () Cyclobutene and uta 1, diene () Propyl isocyanide and propanenitrile (C) Trimethylamine and n propylamine (D) p Cresol and benzyl alcohol 0. The members of the following families do not exhibit metamerism, tautomerism, geometrical isomerism and functional group isomerism : (a) lkyne (b) lkyl halide (c) lkane () a & b () a & c (C) b & c (D) a, b & c 1. Molecular formula C 6 14 will show: () Functional isomerism () Chain isomerism (C) Metamerism (D) ll of these. Molecular formula C 1 will show: ()Position isomerism () Chain isomerism (C) Functional isomerism (D) ll of these. Chain isomerism is possible in: () lkanes () lkenes (C) Carbonyl compounds (D) ll of these 4. Which among the following will not show chain isomerism: ()C 8 () C 4 10 (C) C 1 (D) C 10. Pentene contains () 1 & one bonds () 14 & one bonds (C) 14 & two bonds (D) 14 & no bonds 6. n isomer of propanal is () cetone () Propane (C) Ethanol (D) Propanol 7. The number of possible alkynes with molecular formula C 8 is () () (C) 4 (D) 8. Isomers of propionic acid are () CC & C CC () CC & C 7 C (C) C CC & C 7 (D) C 7 & C CC
5 Kota cademy Karad 9. Consider the following statements: (1) Chain and position isomerism is not possible together between two isomers. () Tautomerism is a chemical phenomenone which is catalysed by acid as well as base. () Tautomers are always metamers (4) Tautomers are always functional isomers Select the correct answer using the codes given below: Codes: () nly is correct () & 4 are correct (C) 1, & 4 are correct (D) 1, & are correct 60. Which among the following compounds will show tautomerism: (), dimethylpropanal (), dimethyl 1 nitropropane (C), 4 pentanedione (D) enzophenone 61. Tautomerism is shown by: () C C C C C () C C C CC (C) (D) ll of these 6. Which one of the following compounds will not show tautomerism? () C 6 C C C C C () C C C C CC (C) C C C (D) C C C N 6. Which statement is correct for keto-enol tautomerism? ()Tautomers are present in equilibrium state () Generally keto form is more stable then enol form (C) Tautomerism is a reversible phenomenon in both gas & solution (D) ll are correct 64. Which statement is correct for tautomerism : (1) It is a chemical phenomenon () This phenomenon takes place only in gases state () This phenomenon takes place in solid state (4) Tautomers are functional isomers () Number of & lone pair present in both tautomer is same. f these correct statements are: () 1, and () 1, 4, (C), 4, (D) 1,, & 4 6. Tautomerism is exhibited by (1) C 6 () () (4) () ll four () II, III & IV (C) I, III & IV (D) none of these
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