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| 1. |
Kanchi takes 5 mL of distilled water in four test tubes A, B, C and D. She dissolves sodium chloride in test tube A, potassium chloride in test tube B, calcium chloride in test tube C and magnesium chloride in test tube D. In which test tubes will soap give lather? |
| Answer» Solution :Soap will give good lather in test tubes A and B because magnesium CHLORIDE and CALCIUM chloride make water HARD and REACT with soap to form scum. | |