Do you expect different products in solution when aluminium (III) chloride and potassium chloride treated separately with (i) normal water (ii) acidified water and (iii) alkaline water? Write equations wherever necessary.

Describe the preparation of potassium permanganate, How does the acidified permanganate solution react with (i) Iron(II) ions (ii) SO_(3)^(2-) and (iii) oxalic acid? Write the ionic equations for the reactions.

Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with: (i) Iodide (ii) Iron (ii) Solution (iii) 'f(H2s

What do you understand by the terms (i) hydrogen economy (ii) hydrogenation (iii) 'syngas' (iv) water-gas shift reaction (v) fuel cell?

What happens when (i) sodium metal is dropped in water (ii) sodium metal is heated in free supply of air (iii) sodium peroxide dissolves in water.

If the freezing point of a 0.01 molal aq.solution of a cobalt (III chloride)-ammonia complex (which behaves a strong electrolyte) is -0.0372^(@)C , the no. of chloride (s) in the coordination sphere of the complex is ( K_(f) of water is 1.86K kg mol^(-1) )

Aluminium is prepared industrially by Hall- Heroult process. Various steps in the concentration of ore are given below. Write them in the correct order. i)The precipitate formed is separated, washed and strongly heated to get alumina. ii) Crushed bauxite is leached with hot sodium hydroxide solution. iii) Impurities are removed from the sodium aluminate solution by filtration. iv) Solution is diluted after adding a little aluminium hydroxide, to precipitate aluminium hydroxide .