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Chemistry

Chemistry
The most common cause of pollution of air is

Carbon dioxide
Smoke
Sulphur dioxide
Carbon monoxide

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Chemistry
Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below.(A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium

A, C and E
A, B, C, D and E
B, D and E
A and C

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Chemistry
Of the following, which one pollutes the air of a big city ?

Cadmium
Lead
Copper
Chromium

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Chemistry
Preparation of ‘Dalda or Vanaspati’ ghee from vegetable oil utilizes the following process :

Oxidation
Hydrolysis
Ozonolysis
Hydrogenation

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Chemistry
Coating of solid waste with impervious material is known as

Chemical fixation
Encapsulation
Capping
Landfill

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Chemistry
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

5x/36
5x
7.2 x
x/6

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