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Chemistry

Chemistry
Highly toxic gas which causes headache, visual difficulty, paralysis and even death is

O3
CO2
CO
All of these

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Chemistry
"Paramagnetism" is the property of

Unpaired electrons
Completely filled electronics subshells
Completely vacant electronic subshells
Paired electrons

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Chemistry
Which is the highest quality of hard coal?

Lignite
Peat
Bituminous
Anthracite

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Chemistry
The percentage of carbon in cost iron is :

0.5 to 1.5
0.01 to 0.25
6 to 8
3 to 5

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Chemistry
Bleaching powder is prepared by passing :

Chlorine over slaked lime
Chlorine over quick lirne
Oxygen over slaked lime
Carbon dioxide over slaked lime

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Chemistry
Charcoal is used in water treatment as a/an

Coagulant
Adsorbent
Solvent
Absorbent

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