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Q. In acetylene molecule, between the carbon atoms there are

KCETKCET 2007Organic Chemistry – Some Basic Principles and Techniques

Solution:

The structure of acetylene is

$H - C \overset{{1 \sigma}}{\equiv} \underset{{ 2 \pi}}{ \equiv } 1 \sigma 2\pi C - H $

Hence, in acetylene molecule, there are one sigma and two pi bonds are present between carbon atoms.