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Chemistry

Chemistry
Main source of lead pollution is from

Insecticides
Sewage
Leaded gasoline
Tobacco

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Chemistry
Iron is extracted from

Haematite
Bauxite
Dolomite
Cinnabar

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Chemistry
Synthetic detergents are prepared from

Hydrocarbons of petroleum
Sodium salts of higher fattyacids
Glycerides
Potassium salts of higher fatty-acids

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Chemistry
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is

oxygen
nitrogen
carbon
hydrogen

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Chemistry
The presence of Cobalt in Vitamin B12 was established for the first time by

Hydrolysis test
Borax-Bead test
Sodium Nitroprusside test
Spectroscopy

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Chemistry
The antiparticle of an electron is

Alpha particles
Positron
Beta particles
Proton

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MORE MCQ ON Chemistry

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