Assertion :Aluminium is used for thermite welding. Reason: Aluminium ores are concentrated by the method of chemical separation.

Both assertion and reason are correct and the reason is the correct explanation of the assertion.

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Both assertion and reason are correct, but the reason is not the correct explanation of the assertion.

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Assertion is correct, but reason is incorrect.

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Assertion is incorrect, but reason is correct.

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Solution

The correct option is B Both assertion and reason are correct, but the reason is not the correct explanation of the assertion.
Thermite process:
$F e_{2} O_{3} + 2 A l \to 2 F e + A l_{2} O_{3}$
Aluminium ores are concentrated by the reaction of ore powder with concentrated solution of $N a O H$ .
So assertion and reason both are correct but the reason is not the correct explanation of the assertion.

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Similar questions

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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