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Chemistry

Chemistry
Of the following commonly used materials, the one that is not an alloy is

Brass
Bronze
Steel
Copper

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Chemistry
Bauxite is an alloy of which of the following metals ?

Tin
Aluminium
Silver
Iron

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Chemistry
Phosphorus is kept in water because

Its ignition temperature is very low
Its ignition temperature is very high
Its critical temperature is low
Its critical temperature is high

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Chemistry
Highest percentage of carbon is found in which form of coal?

Lignite
Anthracite
Bituminous
Peat

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Chemistry
The main constituent of biogas is

Methane
Acetic acid
Oxygen
Methyl alcohol

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Chemistry
Which of the following is a monoatomic gas?

Neon
Fluorine
Oxygen
Nitrogen

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