Question

General formula of saturated monocarboxylic acid is :

• A. $C_n{H}_{2n+1}COOH$
• B. $C_n{H}_{2n}{O}_2$
• C. Both A and B
• D. None of the above

Answer 1

The correct option is C Both A and B

Monocarboxylic acids are in the form of $RCOOH$.

Let's take examples,
For R is $-H$ or $-C{H}_3$,

a) $HCOOH\to C_1{H}_2{O}_2$ which is following $C_n{H}_{2n}{O}_2$ trend.

b) $C{H}_{3}COOH\to C_2{H}_4{O}_2$ which is also following $C_n{H}_{2n}{O}_2$ trend.

When R is other than $-H$ or $-C{H}_3$ group,

a) $C_2{H}_{5}COOH\to C_3{H}_6{O}_2$ which is following $C_n{H}_{2n+1}COOH$ trend.

So, the general formula is both A & B, i.e., $C_n{H}_{2n}{O}_2$ and $C_n{H}_{2n+1}COOH$.

Hence, both options A and B are correct.

Option C is correct.