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Oxyacids of Phosphorus

How many pi b...

Question

How many pi bonds are in the molecule 2-butyne?
( ${C H}_{3} C \equiv C {C H}_{3}$ )

A

1

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B

2

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C

4

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D

6

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E

10

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Solution

The correct option is A 2
pi-bonds are present in only multiple bonds, like double bond and triple bond, whereas in single bond there is no pi-bond.
In this compound, 2-butyne, there is single triple-bond, and in triple bond, there are 2 pi-bonds.

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