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Match list I with II and select the correct answer using the codes given below the lists

List-I List-II
(1) Heavy water (A) Bicarbonates of Mg and Ca in water
(2) Temporary hard water (B) $D_{2} O$
(3) Soft water (C) Sulphates and chlorides of Mg and Ca in water
(4) Permanent hard water (D) No foreign ions in water

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$1 - b, 2 - a, 3 - c, 4 - d$

$1 - c, 2 - d, 3 - b, 4 - a$

$1 - b, 2 - d, 3 - c, 4 - a$

$1 - b, 2 - a, 3 - d, 4 - c$

answer is A.

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Detailed Solution

Heavy water is $D_{2} O (1 - b)$ temporary hard water contains bicarbonates of $C a^{2 +}$ and $M g^{2 +} (2 - a)$ soft water may have no foreign ions $(3 - d)$ Permanent hard water contains sulphates and chlorides of $C a^{2 +}$ and $M g^{2 +} (4 - c)$

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