Assertion :Quenching increases hardness of steel. Reason: Quenching involves heating the steel and tempering in water or oil. This rapid cooling results in hard and brittle steel.

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
Many heat treatment processes are available for steel. Annealing is the process of heating the steel to high temperature to soften it. Quenching involves heating the steel and suddenly tempering in water or oil. This rapid cooling results in hard and brittle steel.

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