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Chemistry

Chemistry
Which of the following is used as a lubricant in heavy machines?

Phosphorus
Bauxite
Sulphur
Graphite

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Chemistry
Ozone depletion in the atmosphere is mainly caused by

Hydrogen sulphide
Chlorofluorocarbon
Nitrogen dioxide
Sulphur dioxide

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Chemistry
The lowest layer of earth's atmosphere is

Troposphere
Mesosphere
Ionosphere
Stratosphere

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Chemistry
The heat value of combustion of Gasoline is

47000 kJ/kg
12600 kJ/kg
39400 kJ/kg
14600 kJ/kg

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Chemistry
Rectified spirit is :

Methylated spirit
95% ethyl alcohol
100% ethyl alcohol
Tincture iodine

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Chemistry
The chemical name of 'laughing gas' is

Nitrogen pentoxide
Nitrogen dioxide
Nitric oxide
Nitrous oxide

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MORE MCQ ON Chemistry

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