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Standard VI
Chemistry
Soaps and Detergents
Hard water co...
Question
Hard water contains calcium and magnesium salts in it.
A
True
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B
False
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Solution
The correct option is
A
True
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Q.
Why hard water contains only calcium and magnesium salts
Q.
Assertion :Scum is formed when hard water is treated with soap. Reason: Hard water contains calcium and magnesium ions. When soap comes in contact with hard water, these ions form calcium and magnesium salts of fatty acids which are insoluble in water. These calcium or magnesium salts precipitate out in the form of scum.
Q.
Calcium and Magnesium salts like _______ cause hardness of water
Q.
Hardness of water is mainly due to the dissolved salts of calcium and magnesium.
Q.
Salts of calcium and magnesium like ___________ cause hardness of water.
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