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Chemistry

Chemistry
White coal is

None of these
Diamond
Uranium
Hydro-electricity

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Chemistry
The coating of a thin layer of zinc on steel or iron objects is known as

Electroplating
Hot dipping
Galvanising
Tinning

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Chemistry
Milk is a colloidal system in which:

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

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Chemistry
In silvery paints, the main constituent present is

White lead
Silver powder
Lead powder
Aluminium powder

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Chemistry
Hardness of the water is commonly measured in terms of

Magnesium sulphate equivalents
Calcium sulphate equivalents
Magnesium carbonate equivalents
Calcium carbonate equivalents

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Chemistry
Which of the following metals is not a pollutant ?

Mercury
Lead
Aluminium
Arsenic

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