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Chemistry

Chemistry
Main source of lead pollution is from

Sewage
Insecticides
Tobacco
Leaded gasoline

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Chemistry
Which one of the following metals pollutes the air of a city having large number of automobiles?

Cadmium
Chromium
Lead
Copper

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Chemistry
Galena is a mineral of

Gold
Lead
Iron
Calcium

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Chemistry
The substance which does not expand on going from liquid state to solid state is

Type metal
Cast-iron
Aluminium
Water

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Chemistry
Which of the following electrodes is used in strongly alkaline solution

Silver - silver chloride electrode
Mercury - mercuric oxide electrode
Mercury - mercurous sulphate electrode
Mercury - mercurous chloride electrode

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Chemistry
Brass gets discoloured in air due to constant exposure in presence of:

Aluminium phosphide
Hydrogenated wafers
Hydrogen sulphide
Aluminium sulphide

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MORE MCQ ON Chemistry

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