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Standard XII

Chemistry

Liquefaction of Gases and Critical Constants

Assertion : ...

Question

Assertion : $A l_{2} O_{3}$ is converted into $A l$ by reduction with carbon at high temp Reason: Carbon has greater affinity for oxygen than aluminium

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect and Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Alumina is converted into Al by reduction with carbon at high temperature.
Carbon has less affinity for oxygen than aluminum. Hence, it cannot remove oxygen from alumina.
Thus Assertion is correct but Reason is incorrect.

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Similar questions

Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K.
Reason (R) Bromine polarises in carbon disulphide.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Assertion :Al2O3 is converted into Al by reduction with carbon at high temp Reason: Carbon has greater affinity for oxygen than aluminium

The correct option is C Assertion is correct but Reason is incorrectAlumina is converted into Al by reduction with carbon at high temperature.Carbon has less affinity for oxygen than aluminum. Hence, it cannot remove oxygen from alumina.Thus Assertion is correct but Reason is incorrect.

Assertion : $A l_{2} O_{3}$ is converted into $A l$ by reduction with carbon at high temp Reason: Carbon has greater affinity for oxygen than aluminium

The correct option is C Assertion is correct but Reason is incorrect
Alumina is converted into Al by reduction with carbon at high temperature.
Carbon has less affinity for oxygen than aluminum. Hence, it cannot remove oxygen from alumina.
Thus Assertion is correct but Reason is incorrect.