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JEE MainChemistryGeneral Organic Chemistry

Match List I with List II. List I (Isomeric Pairs) List II (Type of Isomerism) (I) CH₃CH₂CH₂OH and CH₃CH(OH)CH₃ (P) Metamerism (II) CH₃CH₂CH₂CH₃ and CH₃CH(CH₃)₂ (Q) Functional isomerism (III) CH₃CH₂-O-CH₂CH₃ and CH₃-O-CH₂CH₂CH₃ (R) Position isomerism (IV) CH₃CH₂CHO and CH₃COCH₃ (S) Chain isomerism Choose the correct answer from the options given below:

Options

  1. A(I)-(S), (II)-(R), (III)-(P), (IV)-(Q)
  2. B(I)-(R), (II)-(S), (III)-(Q), (IV)-(P)
  3. C(I)-(R), (II)-(S), (III)-(P), (IV)-(Q)
  4. D(I)-(P), (II)-(S), (III)-(R), (IV)-(Q)

Correct answer

C. (I)-(R), (II)-(S), (III)-(P), (IV)-(Q)

Step-by-step solution

(I) CH₃CH₂CH₂OH (Propan-1-ol) and CH₃CH(OH)CH₃ (Propan-2-ol) differ in the position of the -OH group on the carbon chain, hence they are position isomers (I R). (II) CH₃CH₂CH₂CH₃ (Butane) and CH₃CH(CH₃)₂ (2-Methylpropane) differ in their carbon skeleton (straight chain versus branched), hence they are chain isomers (II S). (III) CH₃CH₂-O-CH₂CH₃ (Ethoxyethane) and CH₃-O-CH₂CH₂CH₃ (1-Methoxypropane) have the same ether functional group but different alkyl groups attached to the polyvalent oxygen atom, hence they are

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