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Chemistry

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

Lignite
Anthracite
Coke
Bituminous

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Chemistry
Which of the following will replace hydrogen from acids to form salts ?

S
Na
P
Ag

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Chemistry
Which one of the following is used to restore the colour of old oilpaintings ?

Barium peroxide
Hydrogen peroxide
Ozone
Sodium peroxide

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Chemistry
The percentage of oxygen in air is approximately

1
0.78
0.01
0.21

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Chemistry
The chemical name of rat poison is

Lead nitrate
Potassium cyanide
Zinc phosphide
Zinc oxide

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Chemistry
Rock salt is a mineral containing

Iron
Sodium
Magnesium
Potassium

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MORE MCQ ON Chemistry

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