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Chemistry

Chemistry
Main source of lead pollution is from

Sewage
Tobacco
Leaded gasoline
Insecticides

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Chemistry
Most commonly used bleaching agent is

Carbon dioxide
Alcohol
Chlorine
Sodium chloride

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

n
n-2
n3
n2

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Chemistry
Which one of the following is known as the 'brown coal'?

Coke
Lignite
Anthracite
Bituminous

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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
The air around the sea is saltish
Sea animals are salt producing
Sea beds have salt producing mines

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Chemistry
KMnO4 can be used as

Pesticide
Disinfectant
Insecticide
Fertilizer

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MORE MCQ ON Chemistry

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