1.

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

Answer»

`8//3`
`5//3`
`8//2`
`9//2`

Solution :`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)`


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