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Question
Name the substance which makes water permanently hard.
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Solution
Sulphates and chlorides of magnesium and calcium
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What do you understand by
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What do you understand by
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Select the correct answer from the choice given in the options.
A substance which causes hardness in water _____.
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A substance added to remove both temporary and permanent hardness in water.
Soap lathers well in hard water.
Give a reason for the following.
Hard water is not good for washing utensils.
What are the causes of temporary hardness and permanent hardness of water?
Why does hard water not form lather with soap?
The pleasant taste of drinking water is due to the presence of a dissolved substance which includes air, CO2, and minerals.
What is soft water?
Which water is hard?
Which water is soft?
