Question

$M{g}_2{C}_3$ reacts with water to form propyne $C_3{H}_4$ has:

• A. six sigma and two pi bonds
• B. three sigma and one pi bond
• C. two sigma and one pi bond
• D. two sigma and three pi bonds

Answer 1

The correct option is A six sigma and two pi bonds

A single bond between two atoms is always considered as sigma bond.

A double bond between two atoms is always considered as one sigma and one pi bond

A triple bond between two atoms is always considered as one sigma bond and two pi bonds.

So according to the given structure propyne has 6 sigma and 2 pi bonds

Hence option $A$ is correct.