Punjab 10th Class Chemistry Chapter 7 Water Mcqs Test Online Chemistry Chapter 7 Water 10th Class Punjab Boards Online MCQs 12345678 Question 1 of 8Chemistry 1. Which is used to remove permanent hardness in water? 1.All of these2.Washing soda 3.Slaked lime 4.Boiling water Question 1 of 8Question 2 of 8 2. Which salt causes temporary hardness in water 1.Calcium sulphate 2.Magnesium sulphate 3.Both calcium sulphate and magnesium sulphate 4.Magnesium hydrogen carbonate Question 2 of 8Question 3 of 8 3. Which salt does not cause the water to become hard. 1.Calcium hydrogen carbonate 2.Magnesium hydrogen carbonate 3.Magnesium sulphate 4.Sodium chloride Question 3 of 8Question 4 of 8 4. The density of water is maximum at. 1.-4°C 2.100°C 3.4°C 4.0°C Question 4 of 8Question 5 of 8 5. Heating calcium hydrogen carbonate produces 1.H₂O 2.CO₂ 3.All of these4.CaCO₃ Question 5 of 8Question 6 of 8 6. Which of the followings is not a water born disease? 1.Anemia 2.Hepatitis 3.Typhoid 4.Dysentery Question 6 of 8Question 7 of 8 7. Which human activity results in contamination of water bodies? 1.All of these2.Septic tanks 3.Livestock waste 4.Pesticides Question 7 of 8Question 8 of 8 8. Percentage of sodium chloride in sea water is 1.2 2.3.4 3.97 4.0.02 Question 8 of 8 Loading... Test By Subject Punjab Test By Topics 10th Class Chemistry You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.