Q140 / 270 · NDA 2011 (Phase 1) · General Ability

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:

A
1 only
Correct answer
B
1 and 3 only
C
2 and 4
D
1,2 and 3

Solution

The correct answer is option (B).

Hence, the correct answer is option: 'B'.

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