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Chemistry

Chemistry
Main source of lead pollution is from

Leaded gasoline
Insecticides
Sewage
Tobacco

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Chemistry
The antiseptic compound present in dettol is

Biothional
Cresol
Iodine
Enloroxylenol

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Chemistry
The gas used to dilute oxygen for breathing by deep sea divers is:

Argon
Helium
Neon
Nitrogen

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Chemistry
1 carat of diamond is equal to

200 g
100 mg
100 g
200 mg

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Chemistry
Diamond is harder than graphite because of :

Tetrahedral structure of diamond
Difference in layers of atoms
None of these
Difference of crystalline structures

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Chemistry
The mineral containing both magnesium and calcium is

magnesite
dolomite
calcite
carnallite

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MORE MCQ ON Chemistry

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