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Chemistry

Chemistry
Which one of the following is not coal variety?

Bituminous
Dolomite
Lignite
Peat

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Chemistry
Isobars are lines joining places having equal

Rainfall
Population
Height above sea-level
Pressure

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Chemistry
The lowest layer of earth's atmosphere is

Troposphere
Ionosphere
Mesosphere
Stratosphere

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Chemistry
Iodex, a pain relief balm, has the smell of ________ .

Propyl salicylate
Methyl salicylate
Ethyl salicylate
Butyl salicylate

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Chemistry
Diamond is lustrous because

It is hard
It is pure
Its refractive index is high
It is colourless

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Chemistry
Which of the following elements is non-radioactive ?

Zirconium
Uranium
Plutonium
Thorium

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