Assertion : Galvanised iron does not rust.
Reason : Zinc has a more negative electrode potential than iron.

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If the assertion and reason both are false.

If assertion is true but reason is false.

If both assertion and reason are true but reason is not the correct explanation of the assertion.

If both assertion and reason are true and reason is the correct explanation of the assertion.

answer is A.

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Detailed Solution

Zinc metal which has a more negative electrode potential than iron will provide electrons in preference of the iron, and therefore corrode first. Only when all the zinc has been oxidised does the iron start to rust.

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