Solution A is a sodium hydroxide solution. Solution B is a weak acid. C is dilute sulphuric acid. Which solution will
(i) liberate sulphur dioxide from sodium sulphite,
(ii) give a white precipitate with zinc sulphate solution,
(iii) contain solute molecules and ions?

Q. The questions (i) to (v) 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?
(ii) Which two solution will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution?
(iii) Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
(iv) Which solution 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?

Q. (a) Sodium hydroxide solution can be used to distinguish between (i) Iron (II) sulphate solution and (ii) iron (III) sulphate solution; because these solutions give different coloured precipitates with sodium hydroxide solution. Give the colour of the precipitate formed with each of the solution.
(b) What will you observe when barium chloride solution is added to iron (II) sulphate solution?
(c) How will the action of dilute hydrochloric acid on sodium carbonate and sodium sulphite enables you to distinguish between these two compounds?

Q. Write the equations for the reaction of zinc with each of the following:
(a) sodium hydroxide solution.
(b) dilute sulphuric acid.
(c) copper sulphate solution.

Q. Write balanced equations for the following reactions:
(i) Iron (II) chloride solution with sodium hydroxide solution.
(ii) Chlorine and cold dilute sodium hydroxide solution.
(iii) Zinc and sodium hydroxide solution.
(iv) Sulphur dioxide and sodium hydroxide solution.
(Give the equation for the formation of the normal salt).

Q. Select the correct answer from the choices a. b, c and d which are given.
Write only the letter corresponding to the correct answer.
(i) A particular solution contains molecules and ions of the solute so it is a
(a) weak acid
(b) strong acid
(c) strong base
(d) salt solution

(ii) An organic weak acid is
(a) Formic acid
(b) Sulphuric acid
(c) Sulphuric base
(d) Hydrochloric acid

(iii) An example of a complex salt is
(a) Zinc sulphate
(b) Solution hydrogen sulphate
(c) Iron (II) ammonium sulphate
(d) Tetramine copper (II) sulphate