what happens if conc `H_(2)SO_(4)` is used in preparing hydrogen by its reaction with a metal?

Explanation

To understand what happens when concentrated sulfuric acid (H₂SO₄) is used to prepare hydrogen gas by reacting it with a metal, we can break down the process step by step.

### Step-by-Step Solution:

1. **Identify the Metal**: Let's consider a common metal such as copper (Cu) for this reaction.

2. **Reaction with Concentrated H₂SO₄**: When copper reacts with concentrated sulfuric acid, the reaction can be represented as:
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