Match the column List - I List - II (Characteristics) (A) Heavy water (P) Water free from Mg 2 + and Ca 2 + (B) Permanent hardness (Q) D 2 O (C) Temporary hardness (R) Water contain bicarbonates of

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Match the column List - I List - II (Characteristics) (A) Heavy water (P) Water free from Mg 2 + and Ca 2 + (B) Permanent hardness (Q) D 2 ​ O (C) Temporary hardness (R) Water contain bicarbonates of Ca 2 + and Mg 2 + (D) Normally used Soft water (S) Water contain sulphates of Mg 2 + and Ca 2 + (T) Water contain disolve CaCO 3 ​

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(A) Heavy water → (Q) D₂O: Heavy water is chemically known as deuterium oxide, represented by the formula D₂O. (B) Permanent hardness → (S) Water containing sulfates of Mg²⁺ and Ca²⁺: This type of hardness is caused by soluble sulfate or chloride salts of calcium and magnesium. (C) Temporary hardness → (R) Water containing bicarbonates of Ca²⁺ and Mg²⁺: It is caused specifically by dissolved magnesium and calcium bicarbonate salts. (D) Normally used Soft water → (P) Water free from Mg²⁺ and Ca²⁺: Soft water lacks these hardness-causing cations, allowing it to easily lather with soap.

List - I	List - II (Characteristics)
(A) Heavy water	(P) Water free from $Mg^{2 +}$ and $Ca^{2 +}$
(B) Permanent hardness	(Q) $D_{2} O$
(C) Temporary hardness	(R) Water contain bicarbonates of $Ca^{2 +}$ and $Mg^{2 +}$
(D) Normally used Soft water	(S) Water contain sulphates of $Mg^{2 +}$ and $Ca^{2 +}$
	(T) Water contain disolve $CaCO_{3}$

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