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Chemistry

Chemistry
The main constituent of biogas is

Acetic acid
Methane
Methyl alcohol
Oxygen

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Chemistry
Sea water is saltier than rain water because

Rivers wash away salts from earth and pour them into the sea
Sea animals are salt producing
The air around the sea is saltish
Sea beds have salt producing mines

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Chemistry
Total number of naturally occurring elements

92
98
110
62

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Chemistry
Which of the following chemicals is used in photography ?

Aluminium hydroxide
Potassium nitrate
Sodium chloride
Silver bromide

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Chemistry
The biogas used for cooking is a mixture of which of the following?

Carbon dioxide and oxygen
Methane and carbon dioxide
Isobutane and propane
Methane and carbon monoxide

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

Copper
Cadmium
Chromium
Lead

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MORE MCQ ON Chemistry

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