C1.5 Water and Hydrogen

1. Why can’t Magnesium be used for the Lab preparation of hydrogen gas in reaction with dilute acids?

2. Why are Potassium, Sodium, Lithium, and Calcium not used for Lab preparation of hydrogen gas in reaction with dilute acids?

3. What is observed when water is passed through white anhydrous copper (II) sulphate?

4. Why is Aluminum not used for Lab preparation of hydrogen gas in the preparation of hydrogen gas in reaction with dilute acids?

5. Hydrogen gas is less dense than air hence it can be collected by upward delivery or downward displacement of air

6. How does water react with metals?

7. Which metal reacts explosively when placed in water and forms a silvery ball that moves rapidly and a purple flame?

8. Mention the properties of Hydrogen gas

9. When organic matter such as hydrocarbons burns in air carbon (IV) oxide and water are produced True or False

10. Which of the following statement about Hydrogen is CORRECT?

11. What happens when Hydrogen burns in air?

12. What happens when hydrogen gas is passed over heated copper (II) oxide and heated Lead (II) oxide and heated Iron (II) oxide?

13. What products are formed when a candle burns in air?

14. How does a metal react with steam?

15. During the production of hydrogen gas by adding Zinc granules to hydrochloric acid, why is the wet hydrogen gas passed through anhydrous calcium chloride?

16. Mention the uses of hydrogen