What is the degree of hardness of a sample of water containing $6 \mathrm{mg}$ of $\mathrm{MgSO}_4$ (molecular mass 120 ) per $\mathrm{kg}$ of water?

NEET UG CHEMISTRY MCQ: HYDROGEN

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What is the degree of hardness of a sample of water containing

6 \mathrm{mg}

\mathrm{MgSO}_4

(molecular mass 120 ) per

\mathrm{kg}

of water?

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Correct option: A

Option A (5) is correct because hardness is expressed in terms of CaCO3 equivalents.

Practice All Chapter MCQs →

\mathrm{CaC}_2+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Ca}(\mathrm{OH})_2+' \mathrm{X}\,'

\mathrm{Mg}_2 \mathrm{C}_3+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Mg}(\mathrm{OH})_2+'\mathrm{Y}\,'

\mathrm{X}

\mathrm{Y}

{H_2}{O_2} \to 2{H^ + } + {O_2} + 2{e^ - };{E^0} = - 0.68V

{\mathrm{H}_\mathrm{2}}{\mathrm{O}_\mathrm{2}}

{\mathrm{H}_2}{\mathrm{O}_2}

{SiH}_4

AlH_3

{NH}_3