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Question

Assertion :SI unit of atomic mass and molecular mass is kilograms. Reason: Atomic mass is equal to the mass of 6.023×1024 atoms.


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


A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is D Both Assertion and Reason are incorrect
The SI unit of atomic and molecular mass is amu or u, not kilogram. One atomic mass unit is approximately equal to the 1 nucleon and numerically equivalent to 1g/mol.

The number of particles in one mole of a substance is equal to the Avogadro number.

So, the correct option is D

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