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Chemistry

Chemistry
Which one of the following has a maximum tendency to form M3 ion ?

P
As
Bi
N

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Chemistry
Colloids can be purified by

Condensation
Dialysis
Condensation
Condensation

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Chemistry
Physico-chemical characteristics of water in water sources undergo changes due to

Aquatic macrophytes
Effluents
Auatic fungi
Evapotranspiration

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Chemistry
Which one of the following nonmetals shows allotropy in the liquid state?

Carbon
Bromine
Sulphur
Phosphorous

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Chemistry
Acid rain is caused by the pollution of environment by

Carbon monoxide and Carbon dioxide
Carbon dioxide and Nitrogen
Ozone and Carbon dioxide
Nitrous oxide and Sulphur dioxide

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Chemistry
The chemical that is used to ripen mangoes is

Calcium carbonate
Calcium sulphide
Calcium carbide
Calcium chloride

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