Question

The cylindrical shape of an alkyne is due to the fact that it has
(a) three sigma C – C bonds
(b) two sigma C – C and one 'π' C – C bonds
(c) three 'π' C – C bonds
(d) one sigma C– C and two 'π' C – C bonds

Answer 1

Three sigma c c bonds answer

Answer 2

Answer:

(d) one sigma C– C and two 'π' C – C bonds is correct answer.

Explanation:

There are three types of carbon carbon bonding

Alkane bond

Alkene bond

Alkyne bond

Alkane is single bonded carbon.

Alkene is doubled bonded carbon.

Alkyne is triple bonded carbon.

The carbons in alkyne are sp hybridized. They undergo sp hybridization.

It is linear hybridization. The s orbital hybridizes only p orbital.

To recognize the bond, we have to calculate the number of lone pairs