Calculate the mass of lime $(\mathrm{CaO})$ obtained by heating $400 \mathrm{~g}$ of $80 \%$ pure lime stone $\left(\mathrm{CaCO}_3\right)$

JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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Application +4 | -1

Calculate the mass of lime

(\mathrm{CaO})

obtained by heating

400 \mathrm{~g}

80 \%

pure lime stone

\left(\mathrm{CaCO}_3\right)

View answer and explanation

Correct option: A

179.2 \mathrm{~g}

Option A (

179.2 \mathrm{~g}

) is correct because it is calculated by first finding the mass of pure

CaCO_3

and then using stoichiometry to determine the mass of CaO produced.

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