Hydrochloric acid reacts with a metal X to form a gas Y, which burns with a 'pop' sound. Sodium hydroxide solution also reacts with same metal X to form same gas Y.
Name X and Y.

Explanation

To solve the problem, we need to identify the metal (X) and the gas (Y) based on the reactions described.

### Step-by-Step Solution:

1. **Identify the Gas (Y)**:
- The problem states that the gas produced (Y) burns with a 'pop' sound. This characteristic is typical of hydrogen gas (H₂). When hydrogen gas is ignited, it produces a distinct 'pop' sound.

2. **Identify the Metal (X)**:
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