Benzamide (A) is prepared by heating benzoic acid with ammonia. It undergoes the following reactions:
`A underset("reaction 1")overset(Br_(2),KOH, Delta)(to) B underset(273-278K "reaction 2")overset(NaNO_(2),HCl)(to) C underset(Delta "reaction 3")overset(H_(3)PO_(2),H_(2)O)(to) D underset(anhyd AlCl_(3) "reaction 4")overset(CH_(3)Cl)(to) E`
E on heating with acidic `KMnO_(4)` gives back benzoic acid.
1. Write the name of reaction 1.

Explanation

To solve the question, we will analyze the reactions step by step and identify the name of the first reaction involving Benzamide (A).

### Step 1: Identify the First Reaction
The first reaction involves Benzamide (A) reacting with bromine (Br₂) in the presence of potassium hydroxide (KOH) and heat (Δ).

### Step 2: Name the Reaction
This specific reaction is known as the **Hofmann Bromamide Reaction**. In this reaction, an amide (Benzamide in this case) is converted into an amine by the action of bromine and a strong base (KOH).

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