Translate the following statements into chemical equations and then balance them .
(a)Hydrogen gas combines with nitrogen to form ammonia .
(b) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
(c) Barium chloride reacts with aliminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
(d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas .

Options

A. Hydrogen gas combines with nitrogen to form ammonia.
`3H_(2)(g)+N_(2)(g) to 2NH_(3)(g)`
B. Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
`2H_(2)S(g)+3O_(2)(g) to 2H_(2)O(I)+2SO_(2)(g)`
C. Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipiate of barium sulphate.
`3BaCl_(2)(aq)+Al_(2)(SO_(4))_(3)(aq) to 2AlCl_(3)(aq)+3BaSO_(4)(s)`
D. Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
`2K(s)+2H_(2)O(I) to 2KOH(aq)+H_(2)(g)`