What happens when dilute hydrochloric acid is added to iron filings? Tick the correct answer.

Which of the statements about the reaction below are incorrect?

2Pb0 (s) + C (s) → 2Pb (s) + CO₂(g)

(a) Lead is getting reduced

(b) Carbon dioxide is getting oxidised

(c) Carbon is getting oxidised

(d) Lead oxide is getting reduced

Fe₂0₃ + 2Al → Al₂0₃ + 2Fe

The above reaction is an example of a:

What is a balanced chemical equation? Why should chemical equations be balanced?

Translate the following statements into chemical equations and then balance them:

(a) Hydrogen gas combines with nitrogen to form ammonia.

(b) Hydrogen sulphide gas bums in air to give water and sulphur dioxide.

(c) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate to barium sulphate.

(d) Potassium metal reacts with water to give potassium hydroxide and hydrogen