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.
Write the equation of the chemical reaction.

Explanation

To solve the problem, we need to write the balanced chemical equation for the reaction between sodium hydroxide (NaOH) and zinc metal (Zn) when heated.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- Sodium hydroxide (NaOH) in aqueous solution.
- Granulated zinc metal (Zn) in solid form.

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