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