Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

$500 g$ impure sample of ${CaCO}_{3}$ on heating gives $70 g$ of $CaO .$ Percentage impurities in sample is

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Answer:

Solution:

$C a C O_{3} \to C a O + C O_{2}$
Let the % purity is $x$
Mol: $\frac{500 \times X}{100 \times 100}$ mol
$\frac{500 \times X}{100 \times 100} \times 56 = 70$
$X = 25$
% Impurities $= 100 - 25 = 75 %$

Stream:NTA_ABHYASSubject:ChemistryTopic:Mole ConceptSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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