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Chemistry

Chemistry
The alkaloid naturally found in coffee, cocoa and cola nut is

Morphine
Tannin
Cocaine
Caffeine

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Chemistry
Conduction band electrons have more mobility than holes because they

Have negative charge
Need less energy to move them
Experience collision less frequently
Are lighter

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Chemistry
Galvanization of iron is carried out using

Tin
Copper
Zinc
Chromium

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Chemistry
________ is used for making vinegar.

Tartaric acid
Acetic acid
Malic acid
Oxalic acid

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Chemistry
What is the covalency of nitrogen in ammonia molecule

3
2
5
4

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Chemistry
Which one of the following is not a cause for present global warming and climate change ?

Carbondioxide emission
Deforstation
CFC emission
Methane emission

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MORE MCQ ON Chemistry

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