Water is said to be permanently hard whe...

Water is said to be permanently hard when it contains `:`

A

Chlorides and sulphates of Mg and Ca:

B

Bicarbonates of Na and K

C

Carbonates of Na and K

D

Phosphates of Na and K

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The correct Answer is:

A

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ALLEN-HYDROGEN-EXERCISE-4

One of the following is an incorrect statement, point it out.
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In the laboratory, H(2)O(2) is prepared by the action of
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Water is said to be permanently hard when it contains :
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Which is the lightest gas ?
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Which of the following pairs will not produce dihydrogen gas ?
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The absorption of hydrogen by platinum is known as :
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In the laboratory, H(2)O(2) is prepared by the action of
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False statement for H atom -
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Which of the following is the best scientific method to test the prese...
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Positron is -
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Boiling point of water is high due to presence of
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Hydrogen from HCl can be prepared by
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Heavy water is
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D(2)O is used more in
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When treated with nitric acid which of the following liberates hydroge...
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Hydrogen gas is not obtained when zinc reacts with
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In aqueous solution, H(2) will not reduce :
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Which of the following statements is incorrect ?
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Which one of the following removes temporary hardness of water ?
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Heavy water (D(2)O) freezes at
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