Which compound is formed when dinitrogen gas reacts with dihydrogen gas?

Balance the following chemical equations:
$(a)$ $KClO_{3} \longrightarrow KCl + O_{2}$
$(b)$ $Na_{2}CO_{3} + HCl \longrightarrow NaCl + H_{2}O + CO_{2}$

Translate the following statement into a chemical equation and balance it:
$(a)$ Aluminium chloride reacts with ammonium hydroxide to form a gelatinous white precipitate of aluminium hydroxide and a salt of ammonium chloride.

Translate the following statements into chemical equations and then balance them.
$(a)$ Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
$(b)$ Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

Why should a magnesium ribbon be cleaned before burning in air?

Explain the "Oxidation" in terms of gain or loss of oxygen with two examples.