Which bond `C-OH ` or ` CO -H` of carboxylic acids is broken when
(a) acid chloride is formed (b) Acid reacts with zinc
(c) Acid reacts with `NH_2` to from amide .

Explanation

To answer the question regarding which bond is broken in carboxylic acids during different reactions, we will analyze each part of the question step by step.

### Step 1: Understanding Carboxylic Acids
Carboxylic acids have the functional group -COOH, which consists of a carbonyl group (C=O) and a hydroxyl group (O-H). The bonds present are:
- C-O (in the -COOH group)
- O-H (in the -OH group)

### Step 2: (a) Formation of Acid Chloride
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