Question

Which of the following may be isomer of aldehyde having general formula ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}}\mathrm{O}$?

• A. Alcohol
• B. Ether
• C. Ester
• D. Ketone

Answer 1

The correct option is D

Ketone

Isomers are those which have the same molecular formula but different structural arrangements.

Every functional group has its own general formula. If the general formula is the same for two compounds then they must be an isomer of each other.

(d) The general formula for ketone is ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}}\mathrm{O}$. This general formula is the same as the aldehyde's general formula.

(a) The general formula of Alcohol is ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}+2}\mathrm{O}$.

(b) The general formula of Ether is ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}+2}\mathrm{O}$.

(c) The general formula of ester is ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}}{\mathrm{O}}_2$.

Hence, correct option is (d)