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Chemistry

Chemistry
Which variety of coal contains recognisable traces of the original plant material ?

Anthracite
Bitumen
Lignite
Peat

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Chemistry
Diamonds are glittering and attractive because light incident on them undergoes

Multiple internal reflections
Hundred percent transmission
Highest refraction
Multiple surface reflections

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Chemistry
Benzene cannot undergo :

Elimination
Substitution
Addition
Oxidation

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Chemistry
Main source of lead pollution is from

Tobacco
Sewage
Insecticides
Leaded gasoline

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Chemistry
Which of the following is used in making smoke bombs?

Hydrogen
Carbon
Phosphorus
Sulphur

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Chemistry
Baking soda is :

Sodium hydroxide
Sodium bicarbonate
Potassium carbonate
Sodium carbonate

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