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Chemistry

Chemistry
Cinnabar is an ore/mineral of

Mercury
Manganese
Lead
Molybdenum

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Chemistry
The most important ore of aluminium is

monazite
haematite
bauxite
magnetite

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Chemistry
Heavy metals got their name because compared to other atoms they have

Higher atomic masses
Higher densities
Higher atomic numbers
Higher atomic radii

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Chemistry
Main pollutants released from iron and steel industry are

CO, CO2 and SO2
CO2, NO2 and SO3
NO, SO3 and H2S
CO2, H2S and NO2

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Chemistry
Coal is formed from

Coke
Crude oil
Deposit of animal waste
Compressed and hardened biomass

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

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

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MORE MCQ ON Chemistry

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