Complete and balance the following equation.

${\mathrm{N}}_2 + {\mathrm{O}}_2 \to$

Complete and balance the following equation.

$\mathrm{Ca}({\mathrm{NO}}_3{)}_2 \stackrel{∆}{\to }$

Complete and balance the following equation.

${\mathrm{PbO}}_2 \stackrel{∆}{\to }$

Complete and balance the following equation.

$\mathrm{NO} + {\mathrm{O}}_2 \to$

Complete and balance the following equation.

$\mathrm{Pb}({\mathrm{NO}}_3{)}_2 + 2\mathrm{NaCl} \to$

(i) Classify the following reactions into different types.

(a) ${\mathrm{AgNO}}_3\left(\mathrm{aq}\right) + \mathrm{NaCl} \left(\mathrm{aq}\right) \to \mathrm{AgCl}\left(\mathrm{s}\right) + {\mathrm{NaNO}}_3\left(\mathrm{aq}\right)$

(b) $\mathrm{CaO}\left(\mathrm{s}\right) + {\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right) \to \mathrm{Ca}\left(\mathrm{OH}{)}_2\right(\mathrm{aq})$

(c) $2{\mathrm{KClO}}_3\left(\mathrm{s}\right) \stackrel{∆}{\to } 2\mathrm{KCl}\left(\mathrm{s}\right) + 3{\mathrm{O}}_2\left(\mathrm{g}\right)$

(ii) Which of the above reaction(s) is/are precipitation reaction(s)? Why is a reaction called precipitation reaction?

Identify the type of chemical reaction taking place.

Barium chloride solution is mixed with copper sulphate solution and a white precipitate is observed.

Identify the type of chemical reaction taking place.

On heating copper powder in air in a China dish, the surface of copper powder turns black.

Identify the type of chemical reaction taking place.

On heating green coloured ferrous sulphate crystals, reddish-brown solid is left and smell of a gas having odour of burning sulphur is experienced.