What is the color of copper sulphate crystals?
Blue
Green
Brown
Orange
Copper sulphate crystals are blue in color.
The elements of sets A , B and C are all colours as follows:
A = { Red , Orange , Yellow , Brown } ,
B = { Blue , Yellow , Green , Brown } ,
C = { Black , Brown , White , Grey }
Then, A U B U C is
A student took four test tubes containing solutions of different colours marked I (colourless) II(Blue), III (Orange) and IV (Pale green) . Which of the tubes contain copper sulphate solution and ferrous sulphate solution?