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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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Understanding +4 | -1

The

\mathrm{O}^{18} / \mathrm{O}^{16}

ratio in some meteorites is greater than that used to calculate the average atomic mass of oxygen on earth. The average mass of an atom of oxygen in these meteorites is _____ that of a terrestrial oxygen atom?

View answer and explanation

Correct option: B

greater than

The correct answer is B (greater than) because a higher

\mathrm{O}^{18} / \mathrm{O}^{16}

ratio indicates a greater proportion of the heavier isotope, resulting in a higher average atomic mass.

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