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Chemistry 90

Chemistry 90

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Quiz Questions And Answers

A pungent smell often present near the urinals is due to

Ammonia
Chlorine
Urea
Sulphur di-oxide

A mixture of salt and sand can be separated by

Dry distillation
Gravity separation
Dissolving in water
Sublimation

Graphite and diamond are the two forms of that occur in nature.

Sulphur
Carbon
Phosphorous
Sodium

Air is

Mixture
Solution
Element
Compound

In the second period, which of the following is a semi metal?

Lithium
Beryllium
Boron
Carbon

Which of the following is used in vulcanization of rubber?

Phosphorous
Carbon
Sulphur
Hydrogen

Colloidal form of soap lathering is also called

Emulsion
Foam
Solution
Gel

Which one of the toxic gases in the environment lowers the resistance to pneumonia in human beings?

Oxyegn
Carbon dioxide
Hydrogen chloride
Nitrogen dioxide

Who discovered electrons?

Chadwick
Rutherford
J.J.Thomson
Goldstein

Alum purifies muddy water by

Coagulation
Absorption
Dialysis
Emulsification
ANSWERS

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