Question

What is the common name of \(CH_3COOH\)? 

• A. Acetic acid
• B. Formic acid
• C. Oxalic acid
• D. Citric acid Correct Answer: (A) Acetic acid Solution:

Hint:

Important common names: \[ HCOOH \rightarrow \text{Formic Acid} \] \[ CH_3COOH \rightarrow \text{Acetic Acid} \] These are frequently asked in chemistry examinations.

Answer 1

The Correct Option is A

Step 1: Spot the group.
The formula $CH_3COOH$ carries the $-COOH$ group, so it belongs to the carboxylic acid family.

Step 2: Count the carbons.
There are two carbon atoms in the molecule, so its proper name is ethanoic acid.

Step 3: Give the everyday name.
The common name for ethanoic acid is acetic acid. It is the sour part of vinegar.
\[ \boxed{\text{Acetic acid}} \]