`CuO+XtoCuSO_(4)+H_(2)O`.Here (X) is

Options

A. `CuSO_(4)`
B. HCl
C. `H_(2)SO_(4)`
D. `HNO_(3)`

Explanation

To solve the equation \( \text{CuO} + X \rightarrow \text{CuSO}_4 + \text{H}_2\text{O} \), we need to identify what \( X \) is. Let's break it down step by step.

### Step 1: Identify the Reactants and Products
- We have copper(II) oxide (\( \text{CuO} \)) as one of the reactants.
- The products are copper(II) sulfate (\( \text{CuSO}_4 \)) and water (\( \text{H}_2\text{O} \)).

### Step 2: Determine the Nature of \( \text{CuO} \)
- \( \text{CuO} \) is a metallic oxide, which is basic in nature.

### Step 3: Identify the Nature of \( X \)
- Since \( \text{CuO} \) is basic, \( X \) must be an acid in order to react with the base to form salt and water. This is based on the neutralization reaction between an acid and a base.

### Step 4: Analyze Possible Acids
- The possible candidates for \( X \) could be common acids like hydrochloric acid (\( \text{HCl} \)), sulfuric acid (\( \text{H}_2\text{SO}_4 \)), and nitric acid (\( \text{HNO}_3 \)).

### Step 5: Test Each Acid
1. **Hydrochloric Acid (\( \text{HCl} \))**:
- Reaction: \( \text{CuO} + \text{HCl} \rightarrow \text{CuCl}_2 + \text{H}_2\text{O} \)
- This produces copper(II) chloride, not copper(II) sulfate. So, \( \text{HCl} \) is not \( X \).

2. **Sulfuric Acid (\( \text{H}_2\text{SO}_4 \))**:
- Reaction: \( \text{CuO} + \text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{H}_2\text{O} \)
- This produces copper(II) sulfate and water, which matches our required products. So, \( \text{H}_2\text{SO}_4 \) is a candidate for \( X \).

3. **Nitric Acid (\( \text{HNO}_3 \))**:
- Reaction: \( \text{CuO} + \text{HNO}_3 \rightarrow \text{Cu(NO}_3)_2 + \text{H}_2\text{O} \)
- This produces copper(II) nitrate, which is not the desired product. So, \( \text{HNO}_3 \) is not \( X \).

### Conclusion
- The only acid that reacts with copper(II) oxide to produce copper(II) sulfate and water is sulfuric acid (\( \text{H}_2\text{SO}_4 \)).
- Therefore, \( X = \text{H}_2\text{SO}_4 \).

### Final Answer
\( X \) is \( \text{H}_2\text{SO}_4 \) (sulfuric acid).

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