(a) What is the nature of the oxide SO₂? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
(b) What is the nature of the oxide Na₂O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.

Q. What is the nature of $N{a}_{2}O$ ? What happens when it is dissolve in water ? Write equation.

Q. What happens when methane ( natural gas) burns in air? Write the chemical equation of the reaction involved.

Q.

(a) What happens when sulphur dioxide is dissolved in water ? Write a word equation for the reaction which takes place.

(b) What happens when an iron nail is placed in copper sulphate solution ? Write word equation of the reaction involved.

Q. (a) What happens when methane (natural gas) burns in air? Write the chemical equation of the reaction involved.
(b) What happens when ethanoic acid reacts with sodium carbonate? Write chemical equation of the reaction involved.
(c) Give a test that can be used to differentiate chemically between butter and cooking oil.

Q. (a) What happens chemically when quicklime is added to water? Write chemical equation of the reaction involved.
(b) What is 'Baking Powder'? How does it make the cake soft and spongy?