Question

Sequence of bond length of the following is A. ethane B. ethene C. ethyne

• A. $A > B > C$
• B. $B > A > C$
• C. $C > B > A$
• D. $C > A > B$

Answer 1

Answer: (A)

$A > B > C$

Answer 2

$\underset{\text{ethyne bond order = 3}}{{H-C \equiv C-H}}$ As the bond order sequence is ethane < ethene < ethyne Bond length $=\frac{1}{\text{bond order}}$ $\therefore$ Sequence o f bond length is ethane > ethene > ethyne