Question

Compound possessing molecular formula $C_7{H}_{16}$ shows optical isomerism. Write the name of the compound.

• A. 2,3-dimethyl pentane
• B. 2,2-dimethyl pentane
• C. 2-methyl hexane
• D. none of the above

Answer 1

The correct option is A 2,3-dimethyl pentane

In a hydrocarbon chain,if there is a chiral present,then that chain would rotate light in different direction and hence considered as optically active.

In this case,$C_7{H}_{18}$

Refer to image

So,the third carbon is chiral as different type of substituents are attached to it.Therefore it is optically active.