Question

Assertion: Alkanes having more than three carbon atoms exhibit chain isomerism.
Reason: All carbon atoms in alkanes are sp‐hybridized.

• A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion
• B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion
• C. If Assertion is true but the Reason is false
• D. If both Assertion and Reason are false

Answer 1

Answer: (C)

Chain isomerism occurs due to difference in the arrangement of $C$ -atoms in the chain. Simplest compound exhibiting chain Isomerism is butane. e.g.

$\underset{\text{n- butane}}{CH _{3} CH _{2} CH _{2} CH _{3}}$

$\underset{\text{lso butane}}{CH_3 - \overset{\overset{CH_3}{|}}{C}H - CH_3}$

All carbon atoms in all alkanes are $s p^{3}$ hybridised.