The ratio of number of sigma `( sigma)` and pi `(pi)` bonds in 2-butynal is

Options

A. `8//3`
B. `5//3`
C. `8//2`
D. `9//2`

Answer

D

Explanation

`CH_(3) - C -= C - underset(O)underset(||)(C)-H`
2 - butynal
no. of `sigma` bonds = `8[4C - H, 3C - C, 1C - O]`
no. of `pi` bonds `= 3[2C - C ,1 C - O]`
`:. ` ratio `= (8)/(3)`