Chapter 4

NCERT
Class 10
Science
Solutions
1. Would you be able to check if water is hard by using a detergent?

Question:

Would you be able to check if water is hard by using a detergent?

Answer:

No, since detergent gives forms lather with both hard and soft water. So using it, we cannot tell whether water is hard or not. But we can check whether water is hard or not using soap. Soap gives lather with soft water, but forms scum with hard water.

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