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

Rita was given an unknown salt for identification. She prepared a solution of the salt and divided it into two parts.

• To the first part of the salt solution, she added a few drops of ammonium hydroxide and obtained a reddish-brown precipitate.
• To the second part of the salt solution, she added a few drops of silver nitrate solution and obtained a white precipitate.

Name:

1. The cation present and
2. The anion present in the salt given for identification.

Match the salts underlined in Column A with the most suitable method of preparation given in Column B.

Explain the following:

\[\ce{H3PO3}\] is not a tribasic acid.

Write balanced equation:

Copper sulphate solution with ammoni um hydroxide solution.

Explain the following:

\[\ce{H3PO3}\] is not a tribasic acid.

Write balanced equation:

Copper sulphate solution with ammonium hydroxide solution.

Explain the following:

\[\ce{H3PO3}\] is not a tribasic acid.

Write balanced equation:

Copper sulphate solution with ammonium hydroxide solution.

Explain the following:

H₃PO₃ is not a tribasic acid.

Write balanced equation:

Copper sulphate solution with ammonium hydroxide solution.

A ______ coloured precipitate is formed when ammonium hydroxide is added to a solution of ferrous chloride.

The diagram given below is a representation of the Industrial preparation of Nitric acid by Ostwald’s process. With respect to the process answer the following questions:

1. Write the temperature and the catalyst required during the catalytic oxidation of ammonia.
2. Give balanced chemical equation for the reaction occurring duringthe conversion of nitrogen dioxide to nitric acid.

Explain the following:

\[\ce{H3PO3}\] is not a tribasic acid. 

Write balanced equation:

Copper sulphate solution with ammonium hydroxide solution. 

Explain the following:

\[\ce{H3PO3}\] is not a tribasic acid.

Write balanced equation:

Copper sulphate solution with ammonium hydroxide solution.

The following is a list of methods for the preparation of salts.

A – direct combination of two elements.

B – reaction of a dilute acid with a metal.

C – reaction of a dilute acid with an insoluble base.

D – titration of a dilute acid with a solution of soluble base.

E – reaction of two solutions of salts to form a precipitate.

Choose from the above list A to E, the best method of preparing the following salt by giving a suitable equation in the following case:

Sodium sulphate.

The following is a list of methods for the preparation of salts.

A – direct combination of two elements.

B – reaction of a dilute acid with a metal.

C – reaction of a dilute acid with an insoluble base.

D – titration of a dilute acid with a solution of soluble base.

E – reaction of two solutions of salts to form a precipitate.

Choose from the above list A to E, the best method of preparing the following salt by giving a suitable equation in the following case:

Copper sulphate.

You are provided with the following chemicals:

NaOH, Na₂CO₃, H₂O, Zn(OH)₂, CO₂, HCI, Fe, H₂SO₄, CI₂, Zn.

Using the suitable chemicals from the given list only, state briefly how you would prepare sodium sulphate.

You are provided with the following chemicals:

NaOH, Na₂CO₃, H₂O, Zn(OH)₂, CO₂, HCI, Fe, H₂SO₄, CI₂, Zn.

Using the suitable chemicals from the given list only, state briefly how you would prepare sodium zincate.