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Chemistry

Chemistry
Which one is the purest form of carbon

Iron
Coal
Graphite
Diamond

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Chemistry
The molecular mass of a gas is

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

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Chemistry
Catalyst is a substance which

None of these
Increases the rate of the reaction
Has no action on the rate of the reaction
Decreases the rate of reaction

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Chemistry
Which of the following produces highest amount of energy upon oxidation?

An alkane
Glucose
Fat
Protein

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Chemistry
Sulphur dioxide bleaches colouring matter by :

Dehydration
Reduction
Decomposition
Oxidation

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Chemistry
Silver gets corroded due to ________ in air.

Hydrogen Sulphide
Carbon dioxide
Oxygen
Nitrogen

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