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Chemistry

Chemistry
What is the mass percentage of oxygen in carbon dioxide (CO2)

0.305
0.727
0.658
0.509

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Chemistry
Except mercury which is the other metal that is liquid at standard conditions for temperature and pressure

Lead
Barium
Bromine
Magnesium

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Chemistry
The chemical name of quartz is

Sodium silicate
Sodium phosphate
Calcium oxide
Calcium phosphate

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Chemistry
The structure of (HPO3)3 is

Tetrahedral
Octahedral
Linear
Cyclic

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Chemistry
The unit of ionic product of water (Kw) is :

Mol2 let-1
Mol-1 let-1
Mol2 let-2
Mol-1 let-2

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

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

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MORE MCQ ON Chemistry

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