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Chemistry

Chemistry
Which of the following is a secondary pollutant ?

CO
SO2
PAN
NO

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Chemistry
An example of major air pollutant is

Carbon dioxide
Oxygen
Helium
Carbon monoxide

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Chemistry
An electric iron has a heating element made of :

Copper
Nichrome
Zinc
Tungsten

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Chemistry
An element of atomic no. 29 belongs to

S-block
D-block
F-block
P-block

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Chemistry
________ is a by product of sewage treatment and can be decomposed to produce biogas

Scum
Sewage
Sewer
Sludge

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Chemistry
Bleaching powder is prepared by passing :

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

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MORE MCQ ON Chemistry

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