(a) When barium chloride solution is mixed with sodium sulphate solution, a white barium sulphate precipitate forms along with the sodium chloride solution.
Na2SO4 + BaCl2 → BaSO4 + 2NaCl
(c) Solid sodium sulphate and Solid barium chloride
(d) Double displacement reaction, since sodium and barium exchange places to form two different compounds.
(e)A white precipitate of silver chloride and sodium nitrate solution is formed by mixing silver nitrate and sodium chloride solutions.