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

what is the function of cryolite in the extraction of aluminium, other than acting as a solvent for bauxite?

Name a non-metallic element which forms acidic and neutral oxides

Name a non-metallic element which has a metallic lustre

Name a non-metallic element which is a liquid at ordinary temperatures

Name a non-metallic element which is a conductor of electricity.

With reference to the reduction of copper (II) oxide , iron (II) oxide, lead (II) oxide and magnesium oxide; place the oxides in order of increasing ease of reduction.[i.e. first write the oxide that is most difficult to reduce and at last, the oxide, that is most easily reduced.]

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 ________