Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

2.76 g of silver carbonate on being strongly heated yields a residue weighing

Options:

Answer:

Solution:

$\underset{2.76}{A g_{2} C O_{3}} \overset{Δ}{\to} A g_{2} O + C O_{2} \overset{Δ}{\to} \underset{(r e s i d u e)}{2 A g + \frac{1}{2} O_{2}}$

Note: $A g_{2} O$ is thermally unstable and decompose on heating liberating oxygen.

Molecular weight of $A g_{2} C O_{3} = 108 \times 2 + 12 + 16 \times 3 = 276 g$

So 276 g of $A g_{2} C O_{3}$ on heating gives residue

$= 2 \times 108 = 216 g$ of Ag

So 2.76 of $A g_{2} C O_{3}$ on heating gives $= \frac{216}{276} \times 2.76$

$= 2.16 g$ of Ag

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

⏱ 2mℹ️ Source: PYQ_2020

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