Q14 / 90 · JEE Main 2019 (09 Jan Shift 2) · Chemistry

The temporary hardness of water is due to:

A
${Na}_{2} {SO}_{4}$
B
$NaCl$
C
${CaCl}_{2}$
Correct answer
D
$Ca {({HCO}_{3})}_{2}$

Solution

{Cl}^{-}

ions are the cause of permanent hardness &

{HCO}_{3}^{-}

ions are the cause of temporary Hardness.

Hence, the correct answer is option: 'D'.

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