Single correct option
Consider the following statements:
1. Temporary hardness of water is caused by chlorides of calcium and magnesium.
2. Soap produces lather easily with hard water.
Which of the statements given above is/are correct?
1. Temporary hardness of water is caused by chlorides of calcium and magnesium.
2. Soap produces lather easily with hard water.
Which of the statements given above is/are correct?
- A. 1 only
- B. 2 only
- C. Both 1 and 2
- D. Neither 1 nor 2
Show answer and solution
Answer: (D) Neither 1 nor 2
Temporary hardness is caused by bicarbonates of calcium and magnesium and can be removed by boiling; chlorides and sulphates cause permanent hardness. So statement 1 is wrong. Hard water forms scum with soap and lathers poorly, so statement 2 is wrong as well.
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