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Chemistry

Chemistry
What is the atomic number of mercury

32
80
41
63

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Chemistry
The lightest gas which is non-inflammable is

Oxygen
Nitrogen
Helium
Hydrogen

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Chemistry
An emulsion is a colloid of a

Liquid in a gas
Gas in a solid
Gas in a liquid
Liquid in a liquid

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Chemistry
Hydrogen is not found in atmosphere because

It is the lightest gas
It is highly inflammable
It is absorbed by plants
It immediately combines with oxygen to form water

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Chemistry
The chemical name of rat poison is

Zinc oxide
Lead nitrate
Zinc phosphide
Potassium cyanide

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

Hot dipping
Galvanising
Tinning
Electroplating

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MORE MCQ ON Chemistry

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