NEET UG CHEMISTRY MCQ: HYDROGEN

1 Medium

1 of 1

Application +4 | -1

A sample of hard water has hardness expressed as

80 \mathrm{ppm}

\mathrm{Ca}^{2+}

. This sample is passed through a cation exchange resin column. Thus,

\mathrm{pH}

of water coming out of exchange resin is

View answer and explanation

Correct option: B

2.4

Option B (2.4) is correct because the cation exchange resin releases H+ ions, decreasing the pH.

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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}

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