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General Science

General Science
Bromine is a

Black Solid
Colourless Gas
Highly Inflammable Gas
Red Liquid

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General Science
Which of the following is not an isotope of hydrogen?

Yttrium
None of the listed here
Protium
Deuterium

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General Science
The percentage of oxygen present in air is approximately-

0.4
0.21
0.23
0.44

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General Science
Isotopes are separated by:

Crystallisation
Filtration
Sublimation
Distillation

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General Science
Paper is manufactured by

Wood, sodium and bleaching powder
Wood and bleaching powder
Wood and resin
Wood, calcium, hydrogen sulphide and resin.

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General Science
Which of the following is used in pencils?

Phosphorous
Silicon
Charcoal
Graphite

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