Chemistry - Complete s-block Question with Solution | TestHub

ChemistryComplete s-blocks-block IIAEasy2 minPYQ_2020
ChemistryEasysingle choice

The hardness of a water sample containing10-3M MgSO4expressed asCaCO3equivalents (in ppm) is
(molar mass ofMgSO4is 120.38g/moland molar mass ofCaCO3is 100.08g/mol)

Options:

Answer:
D
Solution:

Given:10-3M MgSO4
i.e.10-3moleMgSO4present in 1 litre solution
nMgSO4=nCaCO3
Mass ofCaCO3=10-3×100
ppm (in terms ofCaCO3)=mass of CaCO3 weight of solution×106
ppm (in terms ofCaCO3)=10-3×1001000×106=100 ppm

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Complete s-blockSubtopic:s-block IIA
⏱ 2mℹ️ Source: PYQ_2020

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