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Chemistry

Chemistry
The example of oligosaccharide is

Glucose
Cellulose
Ribose
Sucrose

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Chemistry
Spontaneous change is one in there is:

A lowering of free energy
A lowering of entropy
An increase in Internal energy
Increase in free energy

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Chemistry
Iron is extracted from

Haematite
Dolomite
Bauxite
Cinnabar

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Chemistry
Soap helps in better cleaning of clothes because

It absorbs the dirt
It reduces the surface tension of solution
It gives strength to solution
Soap acts like catalyst

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Chemistry
Which of the following is used as filler in tyre of rubber ?

Carbon black
Coke
Coal
Graphite

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Chemistry
The product, 9-nitroanthracene is obtained from anthracene by the action of

Nitric acid and acetic anhydride
Nitric acid and ethyl alcohol
Nitric acid in excess
Nitric acid and acetic acid

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