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Chemistry

Chemistry
The metal extracted from Bauxite is :

Copper
Silver
Manganese
Aluminum

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Chemistry
The scientist who experimentally proved the existance of positron is

Bethe
Bohr
Fermi
Anderson

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Chemistry
When a nutrient like fertilizer is present in large quantities in a water bodies, plants grow and decay in large numbers because of suffocating of pond that does not leave enough oxygen needed to support life. This type of pollution is called

Green house effect
None of these
Smog
Eutrophication

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Chemistry
The function of sedimentation tank in sewage treatment is to:

Disinfect the sewage
Aerate the sewage
Remove water content
Remove suspended solids

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Chemistry
Nitrogen forms a variety of compounds in all oxidation states ranging from

–3 to + 3
–3 to + 4
–3 to + 5
–3 to + 6

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Chemistry
The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas

Will be doubled
Will be reduced to half
Remains unchanged
Will increase four-fold

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MORE MCQ ON Chemistry

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