Zinc dissolves in concentrated `NaOH` solution to produce dihydrogen as well as dioxygen gas.

Explanation

To determine whether the statement "Zinc dissolves in concentrated NaOH solution to produce dihydrogen as well as dioxygen gas" is correct or not, we can analyze the reaction that occurs when zinc interacts with concentrated sodium hydroxide (NaOH).

### Step-by-Step Solution:

1. **Understanding the Reaction**:
- When zinc (Zn) is added to a concentrated sodium hydroxide (NaOH) solution, it reacts to form sodium zincate (Na2ZnO2) and hydrogen gas (H2).

2. **Writing the Chemical Equation**:
- The balanced chemical equation for the reaction is:
\[ \text{Zn} + 2 \text{NaOH} \rightarrow \text{Na}_2\text{ZnO}_2 + \text{H}_2 \]
- In this equation, zinc reacts with sodium hydroxide to produce sodium zincate and hydrogen gas.

3. **Identifying the Gases Produced**:
- From the balanced equation, we can see that the only gas produced during this reaction is hydrogen (H2).
- There is no production of dioxygen (O2) gas in this reaction.

4. **Conclusion**:
- Since the statement claims that both dihydrogen and dioxygen gases are produced, and we have established that only dihydrogen is produced, the statement is incorrect.
- Therefore, the answer to the question is: **The statement is false.**