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Chemistry

Chemistry
What is the element that is in the highest percentage in the composition of the earth ?

Oxygen
Silicon
Iron
Magnesium

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Chemistry
Green house effect is accelerated by

Rapid industrialization
Deforestation
All of these
Increased transportation activity

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Chemistry
What is the covalency of nitrogen in ammonia molecule

5
4
3
2

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Chemistry
Brass is made of

Copper and tin
Tin and lead
Copper and zinc
Copper, tin and zinc

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Chemistry
The atmospheric gas that is mainly responsible for Green House effect :

Nitrogen
Oxygen
Ozone
Carbondioxide

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Chemistry
Which of the following phenomenon is considered responsible for Global Warming?

Fire in coal mines
Greenhouse effect
Trade winds
Dry farming

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MORE MCQ ON Chemistry

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