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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 calcium2. bicarbonate of calcium3. sulphate of magnesium4. bicarbonate of magnesium Select the correct answer using the codes given below.

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






 
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