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

Complete the following by selecting the correct option from the choices given :
The diavalent metal whose oxide is reduced to metal by electrolysis of its fused salt is ________

Name the following:
Gas that yields white precipitates dense white fumes when mixed with hydrogen chloride.

Name the following:
A chloride which is soluble in excess of ammonium hydroxide.

Name a chloride which is soluble in excess of ammonium hydroxide.

1. Name the process used to manufacture ammonia from its elements.
2. Under what conditions do the reactants combine to form ammonia? Give a balanced equation for the reaction.
3. In what ratio by volume, are the above reactants used.
4. State one possible source of each reactant used in the process.
5. What is the function of:
   1. finely divided iron,
   2. molybdenum in the above process.
6. Mention two possible ways by which ammonia produced is removed from unchanged gases.

Explain the following:
The source of heat is removed after sometime in Haber's process.

Explain the following:

Dry N₂ and H₂ must be used in the Haber's process.

Explain the following:

 A promoter is added along with the catalyst in the Haber's process.

The questions below are related to the manufacture of ammonia.

1. Name the process.
2. In what ratio must the reactants be taken?
3. Name the catalyst used.
4. Give the equation for the manufacture of ammonia.
5. Ammonia can act as a reducing agent; write a relevant equation for such a reaction.

What will you observe, when hydrogen chlorides mixed with ammonia?

1. Of the two gases, ammonia and hydrogen chloride, which is more denser? Name the method of collection of this gas.
2. Give one example of a reaction between the above two gases which produces a solid compound.

Give one example of a reaction between the ammonia and hydrogen chloride gases which produces a solid
compound.

Choose the correct answer from the options given below :

 Ammonia is commercially prepared by

Choose the correct answer from the options given below :

 In the Haber's process for the manufacture of NH₃, iron is used as catalyst and molybedenum as promoter. The function of promoter is

Copy and complete the following table :

Copy and complete the following table relating to important industrial process:

Write the observation for the following:
A paper dipped in potassium permanganate solution is put on the mouth of a test tube containing sulphur dioxide gas.

State the colour of the residue formed when nitrate of calcium is strongly heated.