Assertion :Gases are easily absorbed on the surface of metals, especially transition metals. Reason: Transition metals have free valencies

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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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Transition metals have free valencies due to this they can absorb gases on their surface. Hence reason is correct for the given assertion.

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