Question

hllo please answer
how many pi and Sigma bond are present in

a) CH3CHCH2
b) Benzene​

Answer 1

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We know that,

sigma bonds exist in single bond,

one in double bond, and

one in triple bond,

and,

the rest are pi bonds.


Now,

Seeing the structures,

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(a) IN CH3CHCH2,

Total no. of bonds = 9

NO. of sigma bonds = 8

No. of pi bonds = 1

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(b) In Benzene ( C6H6 )

Total no. of bonds = 15

No. of sigma bonds = 12

No. of pi bonds = 3
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Note:-

Refer to attachments for the structure

Answer 2

NEOHEXYL

is the radical obtained from neohexane, by removing one Hydrogen atom.

it's IUPAC nameis same as it is,

i.e.,

NEOHEXYL

The structure is in the attachments.

kindly refer to it.