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Chemistry

Chemistry
Iron rusts quickly in

River water
Sea water
Rain water
Distilled water

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Chemistry
Diamond is lustrous because

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

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Chemistry
The metal present in vitamin B12 is

Co
Mo
Mg
Fe

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Chemistry
Which of the following is secondary air pollutant ?

Photochemical smog
NO2
SO2
Dust particles

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Chemistry
Which one of the following elements is used in the manufacture of fertilizers ?

Potassium
Lead
Fluorine
Aluminium

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Chemistry
The most pure form of Carbon among the options is

Lampblack
Wood Charcoal
Anthracite
Graphite

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