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Chemistry

Chemistry
Among the following the hardest metal is

Gold
Platinum
Tungsten
Iron

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Chemistry
Ozone layer of atmosphere absorbs:

All radiations of Light
Cosmic rays.
Infra-red rays
Ultraviolet rays

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Chemistry
The common name for the compound having formal NaOH is

Caustic potash
Soda ash
Sodium hydroxide
Caustic soda

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Chemistry
Which of the following is used as a lubricant in heavy machines?

Graphite
Bauxite
Sulphur
Phosphorus

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Chemistry
The most important ore of aluminium is

haematite
magnetite
bauxite
monazite

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Chemistry
Persons working in cement plants and lime stone quarries are prone to disease like

Asthma
Cancer
Silicosis
Pneumoconiosis

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MORE MCQ ON Chemistry

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