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)

$\underset{\text{ethyne bond order = 3}}{{H-C \equiv C-H}}$
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