Question

The compound which contains all the four 1°, 2°, 3° and 4°
carbon atoms is
(a) 2, 3-dimethyl pentane
(b) 3-chloro-2, 3 dimethylpentane
(c) 2, 3, 4-trimethylpentane
(d) 3,3-dimethylpentane

Answer 1

$(b) 3-chloro-2,3$ $dimethylpentane$

Explanation:

In the structure of $3-chloro-2,3$ $dimethylpentane$ .In this compound all four degree of carbon is present.c-c-c-c-c  this the main chain of compound .In this compound chloro is present in 3rd carbon,and methyl is  present in 2nd position and 3rd position.

Carbon 1st in  1°,carbon 5th in 1°position (This carbon only attached with only one carbon atom so this is called 1° carbon)

Carbon 4th in 2°position (This carbon attached with 2 carbon so this is called 2° carbon)

Carbon 2nd in 3°position (This carbon attached 3 carbon so this is called 3° carbon)

Carbon 3rd in 4° position  (due to the 3rd carbon attached with chloro,methyl and both side attached with carbon .So 3rd carbon have attached with four different functional group so this is called 4° carbon.)

Answer 2

Answer:

Explanation:3 chloro2,3 dimethylpentene  have all carbon are

So B is correct option