NEET UG CHEMISTRY MCQ: HYDROGEN

1 Hard

1 of 1

Application +4 | -1

Temporary hardness is due to bicarbonates of

{Mg}^{2+}

and

{Ca}^{2+}

. It is removed by addition of

{CaO}

as follows

{Ca}\left({HCO}_3\right)_2+{CaO} \longrightarrow 2 {CaCO}_3+{H}_2 {O}

Mass of

{CaO}

required to precipitate

2 {~g} \,{CaCO}_3

is:

View answer and explanation

Correct option: B

0.56 {~g}

Option B (

0.56 {~g}

) is correct because it is calculated based on the stoichiometry of the reaction between Ca(HCO3)2 and CaO.

More Questions from HYDROGEN

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\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