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Chemistry

Chemistry
Which one of the following organic compounds has fruity smell?

Ether
Alcohol
Ester
Aldehyde

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Chemistry
If lime water is kept in the air, it turns milky due to presence of :

Oxygen
Nitrogen
Carbondioxide
Sulphurdioxide

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Chemistry
Forth floatation process to concentrate the minerals is applicable to

Calamine
Haematite
Chalcopyrites
Bauxite

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Chemistry
Which gas does not form the part of atmosphere ?

None of these
Nitrogen
Chlorine
Helium

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Chemistry
The molecular formula of phosphorous is

P1
P4
P2
P3

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Chemistry
Ruby and sapphire are oxides of

Tin
Iron
Aluminium
Copper

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