The number of sigma σ and pi π bonds in pent- 2 -en- 4 -yne is:

The number of sigma

(σ)

and pi

(π)

bonds in pent-

2

-en-

4

-yne is:

$10 σ$ bonds and $3 π$ bonds
$8 σ$ bonds and $5 π$ bonds
$11 σ$ bonds and 2 $π$ bonds
$13 σ$ bonds and no $π$ bonds

Solution

Pent $- 2 -$ en $- 4 -$ yne

The correct name should be Pent $- 3 -$ en $- 1 -$ yne

Number of $π$ bonds $= 3$

Number of $σ$ bonds $= 10$

Asked in: NEET 2019 (All India)

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