Assertion :One gram atom of sodium is same as one gram molecule of sodium. Reason: Sodium is monoatomic element.

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
1 gram atom of any substance corresponds to mass of one mole of the substance.Hence one mole of sodium represents mass of 1 mole of sodium atoms which is 23 grams.
Being monoatomic element Sodium exists in elemental form, it dosen't exist in the form of molecule of sodium,so one gram atoms of sodium is same as one gram molecule of sodium.

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