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Chemistry

Chemistry
Which one of the following gases has the highest calorific value?

Natural gas
Indane gas
Coal gas
Water gas

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Chemistry
The material used in the manufacture of lead pencil is

Carbon
Mica
Graphite
Lead

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Chemistry
Persons working in cement plants and lime stone quarries are prone to disease like

Asthma
Cancer
Silicosis
Pneumoconiosis

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Chemistry
The acid present in red ants is

Butyric acid
Caproic acid
Formic acid
Acetic acid

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Chemistry
The element which is used for vulcanizing rubber

Phosphorus
Bromine
Silicon
Sulphur

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Chemistry
The percentage of Nitrogen in Air is

0.03
85.02
0.94
78.03

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MORE MCQ ON Chemistry

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