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Chemistry

Chemistry
Silicon is used in

Solar energy devices
All of these
Transistors
Semiconductors

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Chemistry
The gas used for filling weather balloons is

Air
Nitrogen
Hydrogen
Helium

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Chemistry
Which of the following fibres catches fire least ?

Nylon
Rayon
Cotton
Terricot

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Chemistry
Galvanization is the :

Deposition of tin on iron
Deposition of copper on iron
Deposition of zinc on iron
Deposition of aluminium on iron

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Chemistry
The pair of compounds used as anaesthetic in medicines :

Nitrous oxide, Chloroform
Nitrogen dioxide, ether
Chloroform, Nitrogen dioxide
Ether, Ammonia

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Chemistry
The monomers of dacron are

Decane and decanol
Ethylene glygol and phthalic acid
Decanone and decanol
Ethylene glycol and terephthalic acid

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