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Which of the following is incorrect rega...

Which of the following is incorrect regarding the alkanes?

A

(1) All alkynes contain just one triple bond.

B

(2) The hybridization of two `C` atoms is `sp` hybridization.

C

(3) The carbon-carbon triple bond of alkynes consists of two pi `(pi)` bonds and one sigma `(sigma)` bond.

D

(4) There is resitricted rotation of groups joined by a triple bond.

Text Solution

Verified by Experts

The correct Answer is:
D
Cylindrical symmetry exists along the length of a triple bond due to sideways overlap involving two pairs of `p`-orbitals. As a result, there is no restricted rotation for groups joined by a triple bond.
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