Assertion : Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal.
Reason : Copper is extracted by hydrometallurgy.

Options

A. Both assertion and reason are true and reason is the correct explanation of assertion.
B. Both assertion and reason are true but reason is not the correct explanation of assertion.
C. Assertion is true but reason is false
D. Assertion is false but reason is true.

Explanation

### Step-by-Step Text Solution:

1. **Understanding the Assertion**: The assertion states that "Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal."
- This is true because hydrometallurgy is a method used to extract metals from their ores by using aqueous solutions. The ore is dissolved in a suitable reagent (like dilute acids or cyanide solutions), and then a more electropositive metal is used to precipitate the desired metal from the solution.

2. **Understanding the Reason**: The reason states that "Copper is extracted by hydrometallurgy."
- This statement is false. Copper is primarily extracted through pyrometallurgy, which involves heating the ore to high temperatures to extract the metal. Hydrometallurgy is more commonly used for metals like gold and silver.

3. **Evaluating the Truth of the Statements**:
- Since the assertion is true and the reason is false, we can conclude that the assertion correctly describes the process of hydrometallurgy, but the reason given does not correctly apply to copper extraction.

4. **Choosing the Correct Option**: Based on the evaluation:
- The correct answer is that the assertion is true, but the reason is false.

### Final Answer:
The correct option is: **Assertion is true but reason is false.**

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