The IUPAC name of $\left[Co\right(H_{2}NC{H}_{2}C{H}_{2}N{H}_2{)}_3{]}_2(S{O}_4{)}_3$ :

Q.

Which of the following precipitate is formed on mixing sodium sulphate with barium chloride solution

A) black precipitate of Barium sulphate

B) white precipitate of Barium sulphate

C) red precipitate of Barium sulphate

D) blue precipitate of Barium sulphate

Q. Choosing only substances from the list given in the box below , write equations for the reactions which you would use in the laboratory to obtain :

Dilute sulphuric acid. Copper Copper carbonate
Iron Sodium carbonate
Sodium
Zinc

(a) Sodium sulphate
(b) Copper sulphate
(c) Iron (II) sulphate
(d) Zinc carbonate

Q. The IUPAC name of $\left[Fe{\left(H_{2}O\right)}_5\left(NO\right)\right]S{O}_4$ is penta aquanitrosylium iron ( I ) sulphate.

Q. You have 3 metals and salt solutions of these metals. Test
tube Solution

A	Magnesium sulphate
B	Copper sulphate
C	Ferrous sulphate

When you were away, your younger brother added a metal in a blue coloured solution to make it green. Which of the following could have happened?