Question

How many isomers are possible for an alkane having molecular formula $C_{5}H_{12}$?

• A. $5$
• B. $3$
• C. $4$
• D. $2$

Answer 1

Answer: (B)

$3$

Answer 2

There can be 3 possible isomers for an alkane having formula $C _{5} H _{12}$. These are as follows:

$\underset{\text{n-pentane}}{CH_{3}CH_{2}CH_{2}CH_{2}CH_{3}}$, $CH_3 � \overset{\underset{|}{C}{H_3}}{CH}� \underset{\text{Isopentane}}{CH_{2}} � CH_{3}$,

$CH_3� \overset{\underset{|}{C}{H_3}}{\underset{\overset{|}{\underset{{\text{Neopentane}}}{CH_3}}}{C}}- CH_3$