Chemical Bonding - Lonic and Covalent Compounds — Chemistry STD 10 — Question

State one appropriate observation of the following:
Concentrated HCl is made to react with mangesediaoxide

What is property of concentrated sulphuhric acid which allows it to be used in the preparation of hydrogen chloride and nitric acid?

State what you see, when siIver nitrate solution is added to dilute HCl.

Ethylene when reacts with halogens (chlorine and bromine) form saturated products. Name them and write balanced equations.

How can you prove that hydrochloric acid contain :
Hydrogen

How is ammonia soluble in water?

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 solutions 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?

If 6 liters of hydrogen and 4 liters of chlorine are mixed and exploded and if water is added to the gases formed, find the volume of the residual gas.

Give reason for the following:
Zinc is used in galvanization and dry cells.