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Chemistry

Chemistry
The purest form of water is

Tap water
Distilled water
Ground water
Rain water

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Chemistry
Two elements which can form a large number of compounds are

Carbon and Nitrogen
Carbon and Hydrogen
Carbon and Sulphur
Carbon and Oxygen

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Chemistry
Petroleum consists of a mixture of

Hydrocarbons
Carbohydrates
Carbides
Carbonates

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Chemistry
1 carat of diamond is equal to

200 mg
200 g
100 g
100 mg

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Chemistry
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

periodic table of contents
metallurgy
discovery of elements
atomic structure

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Chemistry
The molecular mass of a gas is

Half its vapour pressure
Not related to its vapour pressure
Equal to its vapour pressure
Twice its vapour pressure

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