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

State one relevant observation for the following

When ammonia gas is burnt in an atmosphere of excess oxygen.

The acid which is prepared by catalytic oxidation of ammonia.

State the conditions required for the given reaction to take place:

Catalytic oxidation of ammonia to nitric oxide.

A gas ‘P’ gives dense white fumes with chlorine. Its aqueous solution gives a blue colour with copper (II) hydroxide.

1. Name the gas P.
2. Give its formula.
3. Give three uses of P.

Ammonia solution in water gives a blue precipitate when it combines with a solution of copper salt. The blue precipitate further dissolves in excess of an ammonia solution to give the azure blue solution. Explain with the equation.

explain catalytic oxidation of ammonia.

Name the gas obtained when ammonia burns in an atmosphere of oxygen without any catalyst.

Complete the following equation.
4 NH₃ +5O2 →
What important process starts with the reaction in above? Name the catalyst used.

A gas ‘A’ reacts with another gas ‘B’ in the presence of a catalyst to give a colourless gas ‘C’. The gas ‘C’ when comes in contact with air produces a brown gas ‘D’. The solution of ‘A’ in water turns red litmus blue. Explain the observations.

Ammonia gas is passed over heated copper (I) oxide. 

Identify the substance underlined:

The catalyst used to oxidise ammonia. 

Identify the substance underlined:

The organic compound which when solidified, forms an ice like mass.

 Name the gas evolved in each of the following cases : 
Alumina undergoes electrolytic reduction.

 Name the gas evolved in each of the following cases :
Ethene undergoes hydrogenation reaction. 

Name the gas evolved in each of the following cases :
Ammonia reacts with heated copper oxide.

Study the flow chart given and give balanced equations to represent the reactions A, B and C:

\[\ce{Mg3N2 ->[A] NH3 <=>[B][C] NH4Cl}\]

 Copy and complete the following table which refers to the industrial method for the preparation of ammonia and sulphuric acid: 

How will you prepare hydrochloric acid in laboratory?

Explain, why (or give reasons for)
Hydrochloric acid cannot be concentrated above 22.2% by boiling.

Explain, why (or give reasons for)
Only a very dilute solution of hydrogen chloride in water can be concentrated by boiling the solution while a very concentrated solution would become less concentrated when boiled.