Question

The correct order of bond angle of $C-C-C$ in propane, propene and propyne are

• A. $Propane>Propene>Propyne$
• B. $Propene>Propane>Propyne$
• C. $Propyne>Propene>Propane$
• D. $Propyne>Propane>Propene$

Answer 1

The correct option is C $Propyne>Propene>Propane$

The bond angle depends on the $s$-character, propane has only $s{p}^3$ hybridized carbon, propene has $s{p}^2$ hybridised carbons, propyne has $sp$ hybridized carbons. Greater the $s$-character, greater is the bond angle. Hence, $c$ is the correct answer.