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Chemistry

Chemistry
The gas that is used in the manufacture of vanaspati ghee is :

Carbon dioxide
Oxygen
Nitrogen
Hydrogen

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Chemistry
The mass number of an atom is equal to

the number of protons and electrons
the number of nucleons
the number of neutrons
the number of protons

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Chemistry
Which among the following is a covalent compound ?

Sodium chloride
Magnesium fluoride
Calcium chloride
Carbon tetrachloride

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Chemistry
The least preferred technique in the disposal of Municipal Solid Waste is

Incineration
Land filling
Composting
Bricketting

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Chemistry
The chemical bahaviour of an atom depends upon

The number of neutrons in the nucleus
The number of protons in its nucleus
The number of nucleons in the nucleus
The number of electrons orbiting around the nucleus

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Chemistry
Which one of the following is commonly used for pulp bleaching in the paper industry?

Mild sulphuric acid
Hydrogen peroxide
Glucose isomerase
Iodine and water

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