• (a) What happens when zinc granules are heated with sodium hydroxide solution? Write equation of the reaction which takes place. (b) What happens when bases react with non-metal oxides? Explain with the help of an example. What does this reaction tell us about the nature of non-metal oxides?

• When zinc granules are heated with sodium hydroxide solution, hydrogen gas is formed with sodium zincate salt

Zn(s) + 2NaOH(aq) → Na2ZnO2(aq) + H2(g)

• When base reacts with oxides, salt and water is formed Ca(OH)2 + CO2 → CaCO3 + H2O

This reaction shows that non-metal oxides are acidic in nature