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JEE · NEET Previous Year Question

$The products obtained during treatment of hard water using Clark's method are:$

Topic: JEE PYQ

Answer: C. Full step-by-step solution below.

A $C a C O_{3} and M g C O_{3}$
B $Ca (O H)_{2} and Mg (O H)_{2}$
C $C a C O_{3} and Mg (O H)_{2}$
D $Ca (O H)_{2} and M g C O_{3}$

Correct answer: C

Solution

(c) In Clark's method lime water is used Ca (H C O_{3})_{2} +2Ca (O H)_{2} \to 2 C a C O_{3} + 2 H_{2} O Mg (H C O_{3})_{2} + 2Ca (O H)_{2} \to 2 C a C O_{3} + Mg (O H)_{2} + 2 H_{2} O

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