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Chemistry

Chemistry
'Fire-fighting clothes' are made from

Asbestos
Talc
Steatite
Mica

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Chemistry
The molecular mass of a gas is

Not related to its vapour pressure
Equal to its vapour pressure
Half its vapour pressure
Twice its vapour pressure

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Chemistry
Stains of rust on clothes can be removed by :

Oxalic acid
H2O2
Alcohol
Petrol

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Chemistry
Conduction band electrons have more mobility than holes because they

Are lighter
Have negative charge
Experience collision less frequently
Need less energy to move them

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Chemistry
Which one of the following is used as preservative for foodstuff ?

Picric acid
Sodium Benzoate
Glycerine
Sodium Chloride

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Chemistry
The most pure form of Carbon among the options is

Graphite
Lampblack
Wood Charcoal
Anthracite

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