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Chemistry

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

Iron
Magnesium
Silicon
Oxygen

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Chemistry
The material used in solar cells contains

Tin
Thallium
Caesium
Silicon

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Chemistry
Catalytic converters are generally made from :

Alkaline metals
Hydrogen
Carbon
Transition metals

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Chemistry
Poison used for killing rats is

Magnesium nitride (Mg3N2)
Magnesium phosphide (Mg3P2)
Zinc phosphide (Zn3P2)
Calcium phosphide (Ca3P2)

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Chemistry
Aerated water contains

H2
SO2
CO2
NO2

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Chemistry
A substance which readily forms colloidal solution in contact with water is called

Extrinsic colloid
Hydrophobic colloid
Associated colloid
Hydrophilic colloid

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MORE MCQ ON Chemistry

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