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Question

Which of the following statement(s) is/are true regarding soft water?
  1. Calcium salts are dissolved in it.
  2. It forms lather with soap very easily.
  3. Rain water is an example of soft water.
  4. Magnesium salts are dissolved in it.


Solution

The correct options are
A Calcium salts are dissolved in it.
B It forms lather with soap very easily.
C Rain water is an example of soft water.
Water is said to be soft if it is free from dissolved salts of calcium and magnesium. Soft water forms lather with soap very easily. Few examples of soft water are rain water, distilled water, etc.

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