Q.

Atomic mass unit is defined as-

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a

1/12th the mass of Carbon atom

b

1/16th  the mass of Oxygen atom

c

1/16th  the mass of Argon atom

d

1/40th  the mass of Nitrogen atom

answer is B.

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Detailed Solution

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AMU is defined as one-twelfth the mass of an atom of carbon-12 (12-C). 12-C is the most abundant natural carbon isotope, accounting for over 98% of carbon found in nature. It has an AMU of 12.

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