Write balanced equations for the following reactions: 
Sulphur and hot concentrated Nitric acid.

 Explain why Copper, though a good conductor of electricity, is a non-electrolyte?

Name the gas released at the cathode when acidulated water is electrolyzed.

Explain why solid sodium chloride does not allow electricity to pass through.

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

Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by Barium chloride solution? 

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

ii) Which two solutions will give a white precipitate when treated with dilute Nitric acid followed by silver nitrate solution? 

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

Which solution will give a white precipitate when either dilute Hydrochloric acid or dilute Sulphuric acid is added to it.

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

Which solution becomes a deep/inky blue colour when excess of Ammonium hydroxide is added to it.

A to F below relate to the source and extraction of either Zinc or Aluminium.
A. Bauxite
B. Coke
C. Cryolite
D. Froth floatation
E. Sodium hydroxide solution
F. Zinc blende.

Write dowen the three letters each rom the above list which are relevant to:-
 1) Zinc
 2) Aluminium

30.

Match the descriptions (i) to (v) below with the appropriate term from the list A to J:
A. Acidic oxide
B. Alkali
C. Amphoteric oxide
D. Basic oxide
E. Deliquescence
F.  Efflorescence
G. Electrolysis
H. Electrolyte
I.  Homologous series
J.  Hydrocarbons

i) The property of spontaneously giving up water of crystallization to the atmosphere.

ii) A liquid  or solution, which conducts electricity with accompanying chemical change.

iii) A compound, which is soluble in water and the only negative ions in the solution are hydroxide ions.

iv) an oxide, which forms salts when it reacts with both acids and alkalis.

v) A set of compounds having the same general formula, similar method of prepartion and similar chemical properties.