Assertion :Both 12 g of carbon and 27 g of aluminium will have $6.02 \times 10^{23}$ atoms. Reason: Gram atomic mass of an element contains Avogadro's number of atoms.

Read the above assertion and reason and choose the correct option regarding it.

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
The molar masses of C and Al are 12 g/mol and 27 g/mol respectively.
Both 12 g of carbon and 27 g of aluminium correspond to 1 mole. They will have $6.02 \times 10^{23}$ atoms.
This is because gram atomic mass of an element contains Avogadro's number of atoms.
Thus, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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