Assertion :Statement- I : Thermite mixture ${F e}_{2} O_{3}$ + Al (powder) is used in the welding. Reason: Statement- II : Al is a good reductant

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Thermite is a mixture of one metal oxide and another metal powder. Usually aluminium is used as metal that reduces the metal oxide.

e.g. iron thermite ( $F e_{2} O_{3} + A l)$
A common thermite contains ferric oxide and aluminium in 3:1 ratio by mass. It is used in thermite welding of broken iron parts. The reduction of ferric oxide by aluminium is highly exothermic and therefore the iron formed will be in the molten state.

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Assertion :Statement- I : Thermite mixture Fe2O3 + Al (powder) is used in the welding. Reason: Statement- II : Al is a good reductant

Assertion :Statement- I : Thermite mixture ${F e}_{2} O_{3}$ + Al (powder) is used in the welding. Reason: Statement- II : Al is a good reductant