1. Hydrogen and water

3. //////////////

8. Objective 2.26 Describe the reaction of dilute HCl and H 2 SO 4 with Mg Al Zn Fe

9. Experiment Take a few pieces of the metal in the test tube Add 5 ml of HCl to it Cover the test tube with a rubber bung Test the gas with a lighted splint Write down the observations in your copy book.

14. Combustion of hydrogen Word equation Hydrogen + oxygen  water Chemical equation H2 + O2  H2O Where do you think this reaction is used?

15. Chemical test for water Anhydrous CuSO 4 +H 2 O  CuSO 4.5H 2 O colourless  blue

16. Physical test for water Melting point Boling point Freezing point density