Que. | Detergent produce alther with hard water because |
- A. they are soluble in hard water
- B. they are colourless substances
- C. the calcium and magnesium salts of sulpho are soluble in waternic acids
- D. they form sodium carbonate with hard water
Right Answer is :
✓ C. the calcium and magnesium salts of sulpho are soluble in waternic acids
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