C1.5 Water and Hydrogen

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

2. How does water react with metals?

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

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

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

6. How does a metal react with steam?

7. Mention the properties of Hydrogen gas

8. Mention the uses of hydrogen

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

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

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

12. What happens when Hydrogen burns in air?

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

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

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

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