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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample?
(Atomic weight:

Mg = 24

)

View answer and explanation

Correct option: B

84

Option B (84) is correct because the percentage purity is calculated by comparing the actual yield of MgO to the theoretical yield based on the decomposition of MgCO3.

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