Question

Which of the following groups consists of triple bond?

• A. $-C_3{H}_7$
• B. $-C_4{H}_7$
• C. $-C_5{H}_7$
• D. $-C_5{H}_{11}$

Answer 1

Answer: (C)

$-C_5{H}_7$

General formula for alkynes is: $C_n{H}_{2n-2}$. Therefore formula for an alkyne with 5 carbon atoms is $C_5{H}_8$. So, $C_5{H}_8$ have a triple bond.

So, $-C_5{H}_7$ is the correct option.