Explanation:
The correct answer is D: Zinc reacts with hot water to form zinc oxide and hydrogen.

Here’s the explanation:

Zinc reacts with hot water to form zinc oxide (ZnO) and hydrogen gas (H₂). The reaction can be represented as:

\[
\text{Zn (s)} + \text{H}_2\text{O (g)} \rightarrow \text{ZnO (s)} + \text{H}_2\text{(g)}
\]

However, zinc does not react significantly with cold water, and it only reacts with hot water to produce the products stated.

- Option A is incorrect because zinc does not produce oxygen when reacting with steam; it forms zinc oxide and hydrogen.
- Option B is incorrect for the same reason as option A.
- Option C is incorrect because zinc does react with hot water.
- Option E is incorrect because zinc does not react very easily with cold water.

Thus, the correct answer is D.