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Chemistry

Chemistry
The strongest oxidizing agent among the following is:

Fluorine
Oxygen
Chlorine
Iodine

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Chemistry
Hardest allotrope of carbon is

Coke
Diamond
Lamp black
Graphite

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Chemistry
Which one of the following elements is least likely to be found in commercial fertilisers?

Nitrogen
Potassium
Silicon
Phosphorous

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Chemistry
The percentage of oxygen in air is approximately

0.21
0.78
0.01
1

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Chemistry
For generation of biogas, the materials commonly used are

Crop residues
Aquatic plants
Forest residues
Animal wastes

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Chemistry
The common refrigerant in domestic refrigerator is

Nitrogen
Freon
Neon
Oxygen

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MORE MCQ ON Chemistry

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