Disadvantages of Hardness

Q.

The hardness of water can be detected using ______.

1. Dilute

2. Zn-Cu couple

3. 

4. Scum formed by lathering soap

Q. Soft water does not produce much lather.

1. False
2. True

Q.

Soap forms insoluble precipitates with calcium and magnesium ions present in hard water.

1. True

2. False