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?
$2 PbO_{(s)} + C_{(s)} \longrightarrow 2 Pb_{(s)} + CO_{2(g)}$
$(a)$ Lead is getting reduced.
$(b)$ Carbon dioxide is getting oxidised.
$(c)$ Carbon is getting oxidised.
$(d)$ Lead oxide is getting reduced.

Write the balanced chemical equations for the following reactions:
$(i)$ Hydrogen $+$ Chlorine $\to$ Hydrogen chloride
$(ii)$ Barium chloride $+$ Aluminium sulphate $\to$ Barium sulphate $+$ Aluminium chloride
$(iii)$ Sodium $+$ Water $\to$ Sodium hydroxide $+$ Hydrogen

Why do we apply paint on iron articles?

Explain the term 'Corrosion' with one example.

Explain the term 'Rancidity' with one example.