Chemistry [1 Mark Question Answer]

Answer the following question:
Write the constituents of the electrolyte for the extraction of aluminium.

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

Answer the following question:
Name a metal which is found abundantly in the Earth's crust.

Name the following :
Name an allotrope of a non-metal that allows electricity to pass through it.

A compound that is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.

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

Name the following :
The Process of heating an ore to a high temperature in the presence of air.

Name the following:
A metal which is always present in the amalgam.

Name the following:
or
With reference to the physical propertie of metals and non-metals, state the following exception.
A metal which is liquid at room temperature.

Name the constituents of:
Brass

Name the constituents of:
Bronze

Name the constituents of:
solder,

Name the constituents of:
Duralumin

a metal which forms a liquid alloys at ordinary temperature ?

Name an alloy of:
zinc used in naval ships

Name an alloy of:
copper in electrical appliances or household vessels

Name an alloy of:
lead used in electrical wiring or electrical work in joining metals.

Name an alloy of:
aluminium used in aircraft construction

Both brass and bronze contain copper as major constituents. Name other elements in these alloys.

Name the alloy used for the following purpose.
Aircraft

Name the alloy used for the following purpose.
Surgical instruments

Name the alloy used for the following purpose.
Making parts of watches

Name the alloy used for the following purpose.
Making medals

Name the alloy used for the following purpose.
Making electric circuits

For substance listed below, explain its significance in the extraction of aluminium
Graphite

For substance listed below, explain its significance in the extraction of aluminium
Cryolite

For substance listed below, explain its significance in the extraction of aluminium.
Sodium hydroxide

For substance listed below, explain its significance in the extraction of aluminium.
bauxite

Why is powdered coke sprinkled on top of the electrolyte?

Explain the reason :
Why 'food containing iron salts' should not be cooked in aluminium utensils?

Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction
Write an equation for the reaction which takes place at the anode during the extraction of
aluminium by the electrolytic process ?

Aluminium is extracted from its chief ore, bauxite. The ore is first purified and then the metal is extracted from it by electrolytic reduction
Name a chemical used for dissolving aluminium oxide, In which state is the chemical used?

Which impurities are present in bauxite ?

State the position of aluminium in the periodic table.

How are the following metallic oxides reduced? Write the equation:
Zinc oxide.

Write a balanced equation for the reduction of copper (ll) oxide by hydrogen.

which process is applied to concentrate it?

Name an ore of zinc ?

Why does iron or zinc not occur free in nature?

Two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen.

Name the methods by which concentrated ore is converted to metallic oxide.

How are metals like sodium, potassium, and calcium obtained? Give equations.

Give the principles of:
electromagnetic separation

Give the principles of:
froth floatation process

An ore on being heated in air forms sulphurous anhydride. Write the process used for the concentration of this ore.

Give the principles of:
hydrolytic method

Which metal occurs as: An oxide also give the name of their respective ore.

Which metal occurs as: A carbonate also give the name of their respective ore.

Which metal occurs as: A halide also give the name of their respective ore.

Which metal occurs as: A sulphide also give the name of their respective ore.