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Chemistry

Chemistry
Peroxyacetyl nitrate is a

Secondary pollutant
Vitamin
Acidic dye
Plant hormone

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Chemistry
Sulphur dioxide level in the atmosphere can be reduced by using

Catalytic converters in industry
Low - sulphur fuels
More efficient car engines
Static electricity to attract it in factory chimneys

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Chemistry
Which of the following is the maximum number of electrons that can be present in M-shell?

2
8
32
18

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Chemistry
The deterioration of a metal by an electrochemical process is commonly termed as

Corrosion
Abrasion
Erosion
Passivation

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Chemistry
Which one of the following is most acidic

Na2O
CaO
Al22O3
MgO

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Chemistry
In chemical terms, what are alums used for purifying water for drinking purposes ?

Hydrated chlorides
Double sulphates
Nitrates of aluminium
Double nitrate

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