Assertion :Aluminium is use in thermite process. Reason: Aluminium has a high affinity for oxygen. It readily removes oxygen from oxides of less reactive metals so it is used in thermite welding.

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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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
In thermite welding, aluminum powder is used along with ferric oxide. Aluminum has more affinity towards oxygen and it reduces ferric oxide to elemental iron during welding and also produces a lot
of heat. The molten elemental iron thus formed will seal the broken parts to have strong bonding.

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