Water is said to be permanently hard when it contains

sulphates and chlorides of Mg and Ca

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bicarbonates of Mg and Ca

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sulphates Cu and Hg

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carbonates and bicarbonates of Mg and Ca

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Solution

The correct option is B sulphates and chlorides of Mg and Ca
Water is said to be permanently hard when it contains sulphates and chlorides of Mg and Ca.

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Similar questions

A) Hardness of water	(1) Removed by simple boiling
B) Temporary hardness	(2) Carbonates, chlorides, and sulphates of $C a$ and $M g$
C) Calgon	(3) Bicarbonates, chlorides and sulphates of $C a$ and $M g$
D) Permutit	(4) $N a_{2} A l_{2} S i_{2} O_{8} . x H_{2} O$
	(5) $N a [N a_{4} (P O_{3})_{6}]$

List I	List II
1. Heavy water	A) Bicarbonates of $M g$
2. Temporary hard water	B) No foreign ions in water
3. Soft water	C) $D_{2} O$
4. Permanent hard water	D) Sulphates and Chlorides of $M g$ & $C a$ in water

H_{2} O

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

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