The questions below refer to the following salt solutions listed A to F:- A: Copper nitrate B: Iron [II] sulphate C: Iron [III] chloride D: Lead nitrate E: Magnesium sulphate F: Zinc chloride.
i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution. [i.e. white ppt. insoluble in dil. HCI]
ii) Which two solutions will give a white ppt. when treated with dil. `HNO_3` & `AgNO_3` soln.
iii) Which soln. will give a white ppt. when either dil. HCl or dil. `H_2SO_4` , is added to it.
iv) Which soln. becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it.
v) Which solution gives a white precipitate with excess ammonium hydroxide solution.

Options

A. Copper nitrate
B. Iron (II) sulphate
C. Iron [III) chloride
D. Lead nitrate

Answer

D

Explanation

Lead nitrate gives white precipitate of lead hydroxide when reacted with `NH_(4)OH`.
`Pb(NO_(3))_(2) + NH_(4)OH rarr Pb(OH)_(2) + 2NH_(4)NO_(3)`A