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Assertion : Thermite mixture Fe(2)O(3)+ ...

Assertion : Thermite mixture `Fe_(2)O_(3)+ Al` (powder) is used in the welding.
Reason : Al is a good reductant.

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

Text Solution

Verified by Experts

The correct Answer is:
B
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Statement-I : Thermite mixture Fe_(2)O_(3) +AI (powder) is used in the welding. Statement-II : Al is a good reductant

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

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An intimate mixture of Fe_(2)O_(3) and Ai is used in solid rocket fuel. Calculate the fuel value per gram and per ml of mixture. DeltaH_(Al_(2)O_(3)) = 399.0 kcal, DeltaH_(Fe_(2)O_(3))=199.0 kcal, density of Fe_(2)O_(3) and Al are 5.2 g/ml and 2.7 g/ml respectively.

Assertion : Al_(2)O_(3) is converted into Al by reduction with carbon at high temp. Reason : Carbon has greater affinity for oxygen than aluminium.

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