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Chemistry

Chemistry
Which of the following pollutants is main product of automobile exhaust ?

CO
Hydrocarbons
NO
CO2

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Chemistry
The hydronium ion is

H3O+
HO -
H2+
H+

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Chemistry
Which of the following acts as promoter for iron in Haber's process

Mg
Mo
W
Mn

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Chemistry
Interveinal necrotic spots on leaves appear due to

O3injury
SO2injury
HF injury
NO2injury

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Chemistry
What is the covalency of nitrogen in ammonia molecule

3
4
2
5

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Chemistry
Which of the following is caused by the higher concentration of Nitrogen and Phosphorous ?

Eutrophication
Alkalinity
Acidity
Hardness

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