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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

1 Medium

1 of 1

Application +4 | -1

245 \mathrm{~g}

impure sample of

{KClO}_3(\mathrm{~s})

on heating gives

12 \mathrm{~g}\,\, {O}_2(\mathrm{~g})

according to

2 {KClO}_3(\mathrm{s}) \rightarrow 2 {KCl}(\mathrm{s})+3 {O}_2(\mathrm{g})

Calculate

\%

purity of sample?

View answer and explanation

Correct option: A

12.5

Option A (12.5) is correct because it is calculated using stoichiometry to relate the mass of oxygen produced to the mass of KClO3 in the impure sample.

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