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Chemistry

Chemistry
Which one of the following nonmetals shows allotropy in the liquid state?

Bromine
Phosphorous
Carbon
Sulphur

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Chemistry
PH scale ranges from

0 – 7
None
0 – 14
8 – 14

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Chemistry
The basic chemical building block of natural rubber obtained from trees is

Neoprene
Acetylene
Isoprene
Vinyl Chloride

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Chemistry
Who first published the periodic table

John Dalton
Julius Lothar Meyer
Dmitri Mendeleev
Henry Moseley

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Chemistry
Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?

Hydrogen
Nitrogen
Helium
Oxygen

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Chemistry
Sodium is produced by the electrolysis of

Molten sodium chloride
Its cyanide complex
Aqueous brine solution
Molten sodium carbonate

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