NEET UG CHEMISTRY MCQ: HYDROGEN

1 Hard

1 of 1

Application +4 | -1

1 \mathrm{~L}

of hard water (contains

\mathrm{CaSO}_4

) requires

0.286 \mathrm{~g}

of washing soda

\left(\mathrm{Na}_2 \mathrm{CO}_3 \cdot 10 \mathrm {H}_2 \mathrm{O}\right)

for softening process. What is the hardness of water in ppm?

View answer and explanation

Correct option: A

100

Option A (100) is correct because the hardness is calculated based on the amount of washing soda required to react with the CaSO4.

More Questions from HYDROGEN

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