Assertion: One atomic mass unit is defined as one twelfth of the mass of one carbon-12 atom. Reason: Carbon-12 isotope is the most abundant isotope of carbon and has been chosen as standard

Question

Assertion: One atomic mass unit is defined as one twelfth of the mass of one carbon-12 atom. Reason: Carbon-12 isotope is the most abundant isotope of carbon and has been chosen as standard (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false. (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Choosing C-12 as the standard, the relative masses of atoms come out to be close to whole number values and ambiguity of oxygen as reference was solved.

Q. Assertion: One atomic mass unit is defined as one twelfth of the mass of one carbon- $12$ atom.
Reason: Carbon- $12$ isotope is the most abundant isotope of carbon and has been chosen as standard

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false.

If both assertion and reason are false

Choosing $C - 12$ as the standard, the relative masses of atoms come out to be close to whole number values and ambiguity of oxygen as reference was solved.

Q. Assertion: One atomic mass unit is defined as one twelfth of the mass of one carbon-12 atom. Reason: Carbon-12 isotope is the most abundant isotope of carbon and has been chosen as standard