(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

State one appropriate observation of the following:
Action of dilute HCl or sodium sulphite.

The following question is pertaining to the laboratory preparation of hydrogen chloride gas.

State a safety precaution you would take during the preparation of hydrochloric acid.

Copy and complete the following equation:

\[\ce{Mg3N2 + 6H2O ->}\]

State your observation when dilute hydrochloric acid is added to sodium thiosulphate.

Write equation for the following:
Burning of ammonia in oxygen.

State your observation when :
Dilute hydrochloric acid is added to copper carbonate.

Write an equation for the following:

Catalytic oxidation of ammonia

1. Name the catalyst used in the above equation.
2. In the reaction referred to in the above equation, the catalyst glows red hot. Why?
3. What is the name of the industrial process which starts with the reaction referred to in the above equation?

(a) Name the catalyst used in 1(ii)
(b) In the reaction referred to in 1(ii), the catalyst glows red hot. Why?
(c) What is the name of the industrial process which starts with the reaction reffered to in 1 (ii)?

Look at the following reaction :
A. Nitrogen + metal → compound X
B. X + water → ammonia + another compound
C. Ammonia + metal oxide → metal + water + N2

(i) One metal that can be used for reaction in A is magnesium.

(a) Write the formula of the compound X, that is formed.
(b) Write the balanced equation for reaction B, where Xis the compound formed.
( c) Which property of ammonia is demonstrated by reaction C?

Industrially, ammonia is obtained by direct combination of nitrogen and hydrogen.
(i) Write balanced equation for the direct combination of nitrogen and hydrogen.
(ii) Which of the metals - iron, platinum, copper - catalyse this direct combination?
(iii) Is the formation of ammonia promoted by high pressure or low pressure?

Write the equation for:
The preparation of ammonia from ammonium chloride and calcium hydroxide.

Write the equation for the reaction in the Haber process, that forms ammonia.

Write the equations for the following reactions, which result in the formation of ammonia:
(i) A mixture of ammonium chloride and slaked lime is heated.
(ii) Aluminium nitride and water.

Write a balanced chemical equation for a reaction in which ammonia is oxidised by the following:

A gas which is not oxygen.

Write the equation for the following :

Ammonium chloride is treated with sodium hydroxide.

Give a balanced chemical equation for the following:

Reaction of ammonia with excess of chlorine.