Question

what are the colours of copper sulphate ,ferrous sulphate ,sodium sulphate and Barium Chloride

Answer 1

copper sulphate is blue
ferrous sulphate is pale green
barium chloride is colourless
sodium sulphate is white

Answer 2

Copper sulphate-BLUE
ferrous sulphate-green
sodium sulphate-white
barrium chloride-colour less