Study of Compounds-I Hydrogen Chloride — Chemistry STD 10 — Question

Write balanced equation for the following reaction:
Reduction of lead (II) oxide by carbon.

Identify the gas evolved and give the chemical test of the following case :
Dilute hydrochloric acid reacts with iron (II) sulphide

The volumes of gases A, B, C and D are in the ratio, 1:2:2:4 under the same conditions of temperature and pressure. 
If the temperature and the pressure of gas A are kept constant then what will happen to the volume of A when the number of molecules is doubled?

Name the process used to manufacture ammonia from its elements.

A, B, C are three elements in which B is an inert gas other than helium.With this information complete the following table.

Element	Atomic number	No. of electrons in the valence shell	Group to which the element belongs
A	Z - 1
B	Z
C	Z + 1

Also, explain the following : Electron affinity of element A is more than that that of element C.

Give balanced chemical equations for the following : Reaction of ammonia with excess chlorine

Name the following:
The catalyst used in the constant process.

Write the balanced equation for the preparation of the following salts in the laboratory:
An insoluble base by the action of a soluble base on a soluble salt

A compound of aluminium added to the alumina so as to reduce it melting point.