Question

How many carbon-hydrogen single bond are present in ethyne?

• A. Three
• B. Two
• C. One
• D. Zero

Answer 1

The correct option is B Two

Ethyne $\left({\text{C}}_2{\text{H}}_2\right)$ has two carbon-hydrogen single bonds and one carbon-carbon triple bond.
The structure of ethyne is $H-C\equiv C-\mathrm{H.}$