Assertion :The standard unit for expressing the mass of atom is amu. Reason: amu is also called as avogram.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The standard unit for expressing the mass of atom is amu (atomic mass unit).
It is equal to 1/12 of the mass of an atom of carbon-12 equal to $1.6605 \times 10^{- 19} g$ .
amu is also called as avogram.
Avogram is a unit of mass and weight equal to one gram divided by the Avogadro's number.
Thus, Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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