NEET UG CHEMISTRY MCQ: HYDROGEN

1 Medium

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Application +4 | -1

{XH}_2

(ion exchange resin) can replace

{Ca}^{+2}

ions in hard water as

{XH}_2+{Ca}^{+2} \longrightarrow {XCa}+2 {H}^{+}

. If

1 \mathrm{~L}

hard water after passing through

{XH}_2

has a

\mathrm{pH}=4

then hardness in parts per million of

{Ca}^{+2}

View answer and explanation

Correct option: A

Option A (2) is correct because the pH of 4 corresponds to a specific H+ concentration, which relates to the Ca2+ concentration.

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