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Chemistry

Chemistry
Carborundum is another name of

Silicon carbide
Silicon oxide
Calcium oxide
Calcium carbide

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Chemistry
The process which does not evolve CO2 in air is

Burning
Photosynthesis
Organic delay
Breathing

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Chemistry
The monomer of polythene is

vinyl chloride
ethylene
ethyl alcohol
None of these

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Chemistry
Which is the highest quality of hard coal?

Peat
Lignite
Bituminous
Anthracite

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Chemistry
Interveinal necrotic spots on leaves appear due to

HF injury
NO2injury
SO2injury
O3injury

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Chemistry
Which of the following does the Nucleus of an atom consist of?

Electrons
Protons and electrons
Protons and neutrons
Protons

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