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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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In order to determine the mole precisely, the mass of a carbon AA was determined by a BB and found to be equal to C gC \mathrm{~g}. A,BA, B and CC respectively are
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Correct option: A
A→12A \rightarrow 12 atom, B→B \rightarrow mass spectrometer, C→1.992648×10−23C \rightarrow 1.992648 \times 10^{-23}
Option A (A→12A \rightarrow 12 atom, B→B \rightarrow mass spectrometer, C→1.992648×10−23C \rightarrow 1.992648 \times 10^{-23}) is correct because the mass of a carbon-12 atom is determined using a mass spectrometer and is approximately 1.992648×10−231.992648 \times 10^{-23} g.

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