Name the gas evolved in each of the following cases : Zinc sulphide is treated with dilute hydrochloric acid.

Explanation

To determine the gas evolved when zinc sulfide (ZnS) is treated with dilute hydrochloric acid (HCl), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants in this case are zinc sulfide (ZnS) and dilute hydrochloric acid (HCl).

2. **Write the Chemical Reaction**: When zinc sulfide reacts with hydrochloric acid, the chemical reaction can be represented as:
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