Assertion (A): Carbon reduction for Al₂O₃ is very difficult.
Reason (R): Al forms carbide Al₄C₃ which produces propyne on reaction with H₂O.

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Assertion (A) is false and Reason (R) is true.

Assertion (A) is true and Reason (R) is false.

Both Assertion (A) and Reason (R) are the true and Reason (R) is a correct explanation of Assertion (A).

Both Assertion (A) and Reason (R) are the true but Reason (R) is not a correct explanation of Assertion (A).

answer is C.

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Detailed Solution

Alumina has very high enthalpy of formation. Hence, carbon cannot be used to reduce alumina to aluminium.

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