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

Write balanced equation for the following reaction:
Reduction of copper oxide by hydrogen.

Write balanced equation for the following reaction:
Reduction of iron (III) oxide by carbon monoxide.

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

What is the type of bonding expected in a metallic chloride?

If fused metallic chloride is electrolyzed, at which electrode would the metal be obtained?

What metallic property is shown by the non-metal graphite?

In order to obtain one tone of aluminium, the following inputs are required:
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(i) Write the formula of cryolite.
(ii) Write down the word which correctly completes the following sentence.
"By dissolving aluminium oxide in cryolite, a ______ (conducting / non- conducting) solution is produced.
(iii) Why so much graphite required for this electrolytic process.
(iv) Write the equation for the reaction which takes place at cathode.

Name the following:

The compound formed by the reaction between calcium oxide and silica.

Answer the following question :
Name the process used for the enrichment of sulphide ore.

Name the following :
A metal oxide that can be reduced by hydrogen

Answer the following question with respect by hydrogen : Identify the components of the electrolyte other than pure alumina and the role played by each.

Answer the following question with respect by hydrogen : 
Explain why powdered coke is sprinkled over than electrolytic mixture.

Complete the following by selecting the correct option from the choices given :
The metal whose oxide, which is amphoteric, is reduced to metal by carbon reduction ________

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.