2 ml of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolved which is bubbled through a soap solution before testing.
Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid.

Explanation

To solve the question, we will follow these steps:

### Step 1: Identify the reaction between zinc and sodium hydroxide
When zinc metal reacts with sodium hydroxide (NaOH), it produces sodium zincate and hydrogen gas. The reaction can be represented as:
\[ \text{Zn} + 2 \text{NaOH} \rightarrow \text{Na}_2\text{Zn(OH)}_4 + \text{H}_2 \uparrow \]

### Step 2: Identify the gas evolved
The gas evolved in this reaction is hydrogen gas (H₂).
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