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Which of the statements given below is/are correct. Permanent hardness of water is due to the presence of soluble: 1. chloride of calcium. 2. bicarbonate of calcium. 3. sulphate of magnesium. 4. bicarbonate of magnesium. Select the correct answer using the code given below:

Options

  1. A1 only
  2. B1 and 3 only
  3. C2 and 4
  4. D1,2 and 3

Correct answer

B. 1 and 3 only

Step-by-step solution

The correct answer is option (B).

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