Write the IUPAC names of the following acids whose common names are given :
(I ) Isobutyric acid (ii ) n- Valeric acid (iii ) Succinic acid (iv ) Phenyl acetic acid
(v ) Malonic acid

Explanation

To find the IUPAC names of the given acids based on their common names, we will follow these steps:

### Step 1: Identify the structure of Isobutyric acid
Isobutyric acid is a branched-chain carboxylic acid. Its structure can be represented as:
\[ \text{CH}_3\text{C}(\text{CH}_3)\text{COOH} \]
This structure has a total of 4 carbon atoms.

**IUPAC Name:** 2-methylpropanoic acid
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