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Chemistry

Chemistry
What is the mass percentage of carbon in carbon dioxide (CO2)

0.273
0.158
0.323
0.201

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Chemistry
Milk is a colloidal system in which:

Fat and water are dispersed in each other
Fat is dispersed in water
Water is dispersed in fat
Fat is dissolved

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Chemistry
Glycol is added to aviation gasoline because it

Reduces evaporation of petrol
Reduces consumption of petrol
Prevents freezing of petrol
Increases efficiency of petrol

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Chemistry
Iron is prevented from rusting by coating with zinc. This process is called as

Corrosion
Galvanisation
Sublimation
Reduction

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Chemistry
The ‘Green House effect’ is produced due to the presence of excess amount of

Nitrogen dioxide
Sulphur dioxide
Carbon monoxide
Methane

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Chemistry
The heaviest naturally occurring element is:

Mercury
Polonium
Thorium
Uranium

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MORE MCQ ON Chemistry

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