In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question.

Assertion (A) One atomic mass unit is defined as one-twelfth of the mass of one carbon - 12 atom.

Reason (R) Carbon - 12 isotope is the most abundant isotope of carbon and has been chosen as the standard.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A.

(c) A is false but R is true

(d) Both A and R are false

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Solution

Answer: (b) Both A and R are true but R is not the correct explanation of A.

Both Assertion and Reason are true and Reason is not the correct explanation of Assertion.

Atomic masses of the elements obtained by scientists by comparing with the mass of carbon comes out to be close to the whole number value.

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Similar questions

In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the option out of the choices given below in each question.

Assertion (A) One atomic mass unit is defined as one-twelfth of the mass of one carbon - 12 atom.

Reason (R) Carbon - 12 isotope is the most abundant isotope of carbon and has been chosen as the standard.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A.

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