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Chemistry

Chemistry
What is the element that is in the highest percentage in the composition of the earth ?

Oxygen
Magnesium
Silicon
Iron

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Chemistry
Solder is an alloy of

Copper, lead
Tin, lead
Sodium, lead
Lead, zinc

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Chemistry
The process of removing calcium and magnesium from hard water is known as

Filtration
Sedimentation
Water softening
Flocculation

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Chemistry
The most abundant element in the human body is

Carbon
Nitrogen
Oxygen
Iron

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Chemistry
The charcoal used to decolourise brown sugar solution is

Sugar charcoal
Coconut charcoal
Animal charcoal
Wood charcoal

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Chemistry
Nucleons are regarded as composites sub-particles known as

Quarks
Photons
Leptons
Mesons

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MORE MCQ ON Chemistry

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