In the following chemical reaction "zinc oxide reacts with carbon to produce zinc metal and carbon monoxide.
`ZnO+C rarrZn + CO`
Which of the following is another example of similar type of reaction?

Options

A. `2AgCl(s)overset("Sunlight")rarr2Ag(s)+Cl_2`
B. `Cu+2AgNO_3rarrCu(NO_3)_2+2Ag`
C. `C(s)+O_2(g)rarrCO_2`
D. `CuO+H_2rarrCu+H_2O`

Answer

To solve the question, we need to identify a reaction that is similar to the one given, which is a redox reaction. The original reaction is:

\[ \text{ZnO} + \text{C} \rightarrow \text{Zn} + \text{CO} \]

### Step-by-Step Solution:

1. **Identify the Type of Reaction**:
The reaction between zinc oxide and carbon is a redox reaction. In this reaction, zinc oxide (ZnO) is reduced to zinc (Zn), and carbon (C) is oxidized to carbon monoxide (CO).

2. **Understanding Redox Reactions**:
- **Oxidation**: Loss of electrons (increase in oxidation state).
- **Reduction**: Gain of electrons (decrease in oxidation state).
- In the given reaction, carbon goes from an oxidation state of 0 to +2 (oxidation), while zinc goes from +2 to 0 (reduction).

3. **Finding a Similar Reaction**:
We need to look for another reaction that also involves both oxidation and reduction processes.

4. **Analyzing Options**:
- **Option 1**: Decomposition of AgCl in sunlight (not a redox reaction).
- **Option 2**: Copper displacing silver in silver nitrate solution (displacement reaction, not a redox).
- **Option 3**: Carbon reacting with oxygen to form carbon dioxide (combination reaction, not a redox).
- **Option 4**: Copper oxide reacting with hydrogen gas to form copper and water.

5. **Evaluating Option 4**:
- The reaction is:
\[ \text{CuO} + \text{H}_2 \rightarrow \text{Cu} + \text{H}_2\text{O} \]
- In this reaction, copper oxide (CuO) is reduced to copper (Cu), and hydrogen (H2) is oxidized to water (H2O).
- Oxidation states:
- Cu in CuO: +2
- Cu in elemental form: 0
- H in H2: 0
- H in H2O: +1
- Therefore, CuO is reduced (oxidation state decreases from +2 to 0), and H2 is oxidized (oxidation state increases from 0 to +1).

6. **Conclusion**:
Since option 4 involves both oxidation and reduction, it is indeed a redox reaction similar to the original reaction given in the question.

### Final Answer:
The correct answer is **Option 4: Copper oxide reacts with hydrogen gas to produce copper and water**.