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JEE Main · 2026 · 21 Jan 2026 · Shift 2 · General Organic Chemistry

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Match List-I with List-II.

List-I (Pair of Compounds):
A. 2-Methylpropene and but-1-ene
B. Cis-but-2-ene and trans-but-2-ene
C. 2-Butanol and diethyl ether
D. But-1-ene and but-2-ene

List-II (Type of Isomers):
I. Stereoisomers
II. Position isomers
III. Chain isomers
IV. Functional group isomers

Choose the correct answer from the options given below:

Answer: A → III, B → I, C → IV, D → II

Solution

2-Methylpropene and but-1-ene share the formula but differ in the branching of the carbon skeleton, making them chain isomers. Cis-but-2-ene and trans-but-2-ene have the same connectivity and differ only in the spatial arrangement of groups about the restricted double bond, so they are stereoisomers. 2-Butanol and diethyl ether both answer to yet carry different functional groups, an alcohol against an ether, making them functional group isomers. But-1-ene and but-2-ene differ only in where the double bond sits on the same chain and are position isomers. Hence 2-methylpropene/but-1-ene are chain isomers, the but-2-enes are stereoisomers, 2-butanol/diethyl ether are functional group isomers, and but-1-ene/but-2-ene are position isomers.
Structure A
A
Structure B
B
Structure C1
C1
Structure C2
C2
Structure D1
D1
Structure D2
D2

JEE Main · 2026 · 21 Jan 2026 · Shift 2 · Match the columns

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