NEET UG CHEMISTRY MCQ: HYDROGEN

1 Hard

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100 mL of a water sample contains 0.81 g of calcium bicarbonate and 0.73 g of magnesium bicarbonate.
The hardness of this water sample expressed in terms of equivalents of

CaC{O_3}

is
(molar mass of calcium bicarbonate is

162\,g\,mo{l^{ - 1}}

and magnesium bicarbonate is

146\,g\,mo{l^{ - 1}}

)

View answer and explanation

Correct option: D

10,000 ppm

Option D (10,000 ppm) is correct because it is calculated by converting the bicarbonates to CaCO3 equivalents and then to ppm.

More Questions from HYDROGEN

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Hydrogen accepts an electron to form inert gas configuration. In this it resembles

\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}\,'

The products '

\mathrm{X}

' and '

\mathrm{Y}

' respectively are

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

This equation represents which of the following behaviour of

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

Which reaction shows oxidizing nature of

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

? Which of the following could act as propellent for rockets. (A):

{SiH}_4

AlH_3

and

{NH}_3

are ionic hydrides

(R):Ionic hydrides do not react with water