1.

(A) Mass spectrometer is used for determination of atomic mass of isotopes. (R) Isotopes are the atoms of same element having same atomic number but different mass numbers.

Answer»

If both (A) and (R) are CORRECT and (R) is the correct EXPLANATION of (A).
If both (A) and (R) are correct but (R) is not the correct explanation of (A).
If (A) is correct but (R) is WRONG.
If (A) is wrong but (R) is correct.

Answer :A


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