NEETChemistryGeneral Organic Chemistry
Match List-I with List-II: List-I List-II (A) Pentan-2-one and Pentan-3-one (I) Chain isomerism (B) But-1-yne and But-2-yne (II) Position isomerism (C) Pentane and 2-methylbutane (III) Functional isomerism (D) Ethanol and methoxymethane (IV) Metamerism Choose the correct answer from the options given below:
Options
- A(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
- B(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
- C(A)-(IV), (B)-(II), (C)-(I), (D)-(III)
- D(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
Correct answer
C. (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
Step-by-step solution
(A) Pentan-2-one ( CH ₃- CO - CH ₂ CH ₂ CH ₃ ) and Pentan-3-one ( CH ₃ CH ₂- CO - CH ₂ CH ₃ ) have different alkyl groups attached to the polyvalent carbonyl group ( - CO - ), so they exhibit metamerism. (A)-(IV). (B) But-1-yne and But-2-yne differ in the position of the carbon-carbon triple bond, making them position isomers. (B)-(II). (C) Pentane and 2-methylbutane have different carbon skeletons, classifying them as chain isomers. (C)-(I). (D) Ethanol is an alcohol ( - OH ) and methoxymethane is an ether ( - O -