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JEE Main 2025 Jan 28 Shift 2, Chemistry Q19: Structural Isomerism

JEE Main2025Jan 28, Shift 2Chemistry
Q.

Given below are two statements :

Statement (I) : and are isomeric compounds.

Statement (II) : and are functional group isomers.

In the light of the above statements, choose the correct answer from the options given below :

  1. A

    Both Statement I and Statement II are false

  2. B

    Both Statement I and Statement II are true

  3. C

    Statement I is true but Statement II is false

  4. D

    Statement I is false but Statement II is true

Solution

Statement I: Cyclobutane has molecular formula and so does but-1-ene. Same formula, different connectivity (one is a ring, the other an open chain with a double bond), so they are ring-chain isomers. True.

Statement II: Both compounds share the formula , but one is a amine () while the other is a amine (). The functional group itself differs, hence they are functional group isomers. True.

Both statements are true.

Concept behind this question

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