Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions. 

Explanation

To identify the gas produced when Iqbal treated the divalent element M with sodium hydroxide and hydrochloric acid, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Element M**:
- The element M is described as a lustrous, divalent element. This suggests that it is a metal, likely zinc (Zn), which is known to be divalent and has a shiny appearance.

2. **Reaction with Sodium Hydroxide (NaOH)**:
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