NEET Chemistry Atomic & Molecular Mass Assertion Reason Question
Assertion (A): The mass of an oxygen-16 atom is approximately 15.995 unified mass units.
Reason (R): The unified mass unit is defined based on the mass of a carbon-12 atom being exactly 12 unified mass units.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false.
Correct Answer
Detailed Explanation
The assertion is supported by the fact that the mass of an oxygen-16 atom is given as 15.995 amu in the NCERT context. The reason is correct because the unified mass unit is indeed defined by assigning exactly 12 unified mass units to a carbon-12 atom.
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