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Chemistry

Chemistry
Charcoal is used in water treatment as a/an

Absorbent
Solvent
Coagulant
Adsorbent

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Chemistry
Percentage of lead in lead pencils is

80
31-66
40

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Chemistry
Mixture can be

Pure substance
Homogeneous
Both A and B
Heterogeneous

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Chemistry
Major portion of the earth’s crust is mainly constituted by

Oxygen and Iron
Silicon and Aluminium
Oxygen and Silicon
Silicon and Iron

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Chemistry
For generation of biogas, the materials commonly used are

Forest residues
Aquatic plants
Animal wastes
Crop residues

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Chemistry
The term 'brown air' is used for

Acid fumes
Photochemical smog
Sulphurous smog
Industrial smog

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MORE MCQ ON Chemistry

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