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Chemistry

Chemistry
Which of the following is not a nucleon?

Positron
Electron
Neutron
Proton

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Chemistry
Colloids can be purified by

Condensation
Condensation
Condensation
Dialysis

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Chemistry
The chemical that is used to ripen mangoes is

Calcium carbonate
Calcium chloride
Calcium carbide
Calcium sulphide

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Chemistry
Coal is formed from

Compressed and hardened biomass
Crude oil
Deposit of animal waste
Coke

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Chemistry
In vulcanisation process, rubber can be hardened by adding

Alcohol
Sulphur
Nitrogen
Silicon

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Chemistry
Which one of the following is also known as solution ?

A heterogeneous mixture
A homogeneous mixture
A compound
A suspension

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