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Chemistry

Chemistry
Nucleus of an atom consists of.

Electron, Proton and Neutron
Neutron
Proton and Neutron
Proton

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Chemistry
Ozone layer of atmosphere absorbs:

All radiations of Light
Ultraviolet rays
Cosmic rays.
Infra-red rays

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Chemistry
For generation of biogas, the materials commonly used are

Forest residues
Animal wastes
Aquatic plants
Crop residues

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Chemistry
Which one of the following is not present in cement ?

Gypsum
Alumina
Clay
Alum

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Chemistry
Which of the following elements is found in all organic compounds

Oxygen
Calcium
Nitrogen
Carbon

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

Bauxite
Sulphur
Graphite
Phosphorus

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