Question

Can we test hard water by using detergent? Write one more method other than using soap to test the hardness of hard water.(Delhi - 2012)

Answer 1

Answer:

No, hard water cannot be tested using detergent. Because it works well with both hard as well as soft water.

If we wash our hands with soap and hard water, the slipperyness of the soap remains in our hand for a longer period of time. Hence, we can easily identify it.