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Chemistry

Chemistry
What is the covalency of nitrogen in ammonia molecule

2
4
3
5

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Chemistry
The most abundant rare gas in the atmosphere is

He
Ar
Xe
Ne

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Chemistry
Which of the following is a man-made source of air pollution ?

Automobile exhaust
All of these
Bacterial action in soil and swamp areas
Forest fire

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Chemistry
The number of waves in n x 10th Bohr's orbit are

n-2
n3
n2
n

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Chemistry
Nitric acid does not react with

Iron
Gold
Copper
Zinc

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Chemistry
Aspirin is

Methoxy benzoic acid
Phenyl Salicilate
Acetyl Salicilic acid
Methyl Salicilate

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