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Hardness of Water and Treatment

A water sampl...

Question

A water sample is said to contain permanent hardness if water contains:

A

sulfates and chlorides of calcium and magnesium.

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B

carbonates of calcium and magnesium.

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C

bicarbonates of calcium and magnesium.

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D

sulfates and chlorides of sodium and potassium.

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Solution

The correct option is A sulfates and chlorides of calcium and magnesium.
Permanent hardness of water is due to sulfates and chlorides of calcium and magnesium. Temporary hardness of water is due to bicarbonates of calcium and magnesium.

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Similar questions

Q. Permanent hardness of water is due to the presence of chlorides and salts of calcium and magnesium. It can be removed by using .

Q. Permanent hardness is due to the presence of soluble salts of magnesium and calcium in the form of chlorides and sulphates in water. Permanent hardness of water can be removed by:

Q. Consider the following statements:
Hard water does not give lather with soap because hard water contains:
(a) calcium bicarbonate
(b) magnesium bicarbonate
(c) chlorides of calcium and magnesium
(d) sulphates of calcium and magnesium
Which of these statements are correct?

Q. Assertion :Permanent hardness of water can be removed by using washing soda Reason: Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates

Q. Assertion (A): Hardness of water is removed by treatment with sodium carbonate.
Reason (R): Sodium carbonate reacts with soluble magnesium and calcium chloride to form water soluble compounds.

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