Assertion : In the electrolytic reduction of `Al_(2)O_(3)`, cryolite is used.
Reason : Cryolite is an ore of aluminium.

Options

A. If both assetion and reason are CORRECT, and reason is the CORRECT explanation of the assertion
B. If both assertion and reason are CORRECT, but reason is NOT the CORRECT explanation of the assertion
C. If assertion is CORRECT but reason is INCORRECT
D. If assertion is INCORRECT but reason is CORRECT

Answer

To solve the question regarding the assertion and reason provided, we can break it down step by step:

### Step 1: Understand the Assertion
The assertion states that "In the electrolytic reduction of \( \text{Al}_2\text{O}_3 \), cryolite is used." This is true. Cryolite (\( \text{Na}_3\text{AlF}_6 \)) is indeed used as a solvent in the electrolytic process to reduce alumina (\( \text{Al}_2\text{O}_3 \)) to aluminum metal.

**Hint:** Remember that cryolite helps in lowering the melting point of alumina and improves the conductivity of the electrolyte.

### Step 2: Understand the Reason
The reason states that "Cryolite is an ore of aluminium." This is false. Cryolite is not an ore of aluminum; rather, it is a synthetic compound used in the extraction process. The primary ore of aluminum is bauxite, which contains aluminum oxide.

**Hint:** Distinguish between ores and compounds used in metallurgy. Ores are naturally occurring minerals from which metals can be extracted.

### Step 3: Evaluate the Statements
Both the assertion and the reason are evaluated separately:
- The assertion is **true**.
- The reason is **false**.

### Step 4: Conclusion
Since the assertion is true but the reason is false, the correct conclusion is that the assertion is correct, but the reason does not support the assertion. Therefore, the answer to the question is that the assertion is true and the reason is false.

**Final Answer:** The assertion is true, and the reason is false.