1. Quiz on Neutralization

2. 1. What happens when sodium hydroxide with litmus solution are added with hydrochloric acid slowly? The solution turns yellow. The solution turns red. The solution turns blue. The solution turns orange.

3. 2.Name the two products formed when hydrochloric acid mixes with sodium hydroxide. Water and Sodium nitrate Water and Sodium oxide Water and Sodium chloride Water and Sodium sulphate

4. 3. Describe the observable changes when equal volume of hydrochloric acid and sodium hydroxide of the same concentration with universal indicator added mix together. Green coloured solution will be formed. Red coloured solution will be formed. Blue coloured solution will be formed. White coloured solution will be formed.

5. 4. State the condition of the soil suitable for growing vegetables. Slightly alkaline soil Neutral soil Slightly acidic soil

6. 5. What is gastric acid? Carbonic acid Nitric acid Sulphuric acid Hydrochloric acid

7. 6. What is the chemical composition of antacids? Magnesium hydroxide Sodium hydroxide Potassium hydroxide Ammonium hydroxide (Ammonia)

8. 7. What kind of chemical is present in the mosquito bites? Formic acid Ethanoic acid Propanoic acid Butyric acid

9. 8.What is the nature of the secretion of the stings of wasps? Acidic Neutral Alkaline

10. 9. Sulphuric acid is used to clean the surface of steel plates before they are plated with colouring substances. Suggest a way to treat the acidic waste water before it is discharged into the environment. Directly discharged to river. Acidic waste water is treated with large amount of water to dilute the excess acid. Acidic waste water is treated with lime to neutralize the excess acid. Universal indicator is added to acidic waste water to test its pH value.

11. 10. What is the pH of waste water discharged from dying factory? Acidic, pH 1-3 Acidic, pH 4-6 Alkaline, pH 10-12 Alkaline, pH 13-14