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Chemistry

Chemistry
Percentage of lead in lead pencils is

40
31-66
80

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Chemistry
The material which can be deformed permanently by heat and pressure is called a

thermoset
polymer
thermoplastic
chemical compound

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Chemistry
Commonly used antiseptic 'Dettol' is a mixture of

Phenol + terepineol
O-chlorophenoxylenol + terepineol
O-cresol + terepineol
Chloroxylenol + terepineol

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Chemistry
The chief source for the production of nitrogeneous fertilizers is :

Ammonia
Nitrogen
Nitric acid
Nitrogen dioxide

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Chemistry
The ionic radii of N3-, O2-, F- and Na+ follows the order

Na+ > O2- > N3- > F-
N3- > O2- > F- > Na+
N3- > Na+ > O2- > F-
O2- > F- > Na+ > N3-

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Chemistry
The components of water can be separated by

They can not be separated
Both A and B
Physical methods
Chemical methods

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MORE MCQ ON Chemistry

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