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Chemistry

Chemistry
Which one of the following is most acidic

MgO
Na2O
Al22O3
CaO

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Chemistry
The percentage of oxygen in air is approximately

1
0.78
0.21
0.01

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Chemistry
Element 106 was discovered by

Seaborg
Rutherford
Kurchatove
Lawrence

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Chemistry
Which of the following pollutants is main product of automobile exhaust ?

Hydrocarbons
NO
CO
CO2

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Chemistry
Highest percentage of carbon is found in which form of coal?

Lignite
Anthracite
Bituminous
Peat

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Chemistry
The graphite rods in the nuclear reactor

convert fast moving neutrons into thermal neutrons
produce neutrons
undergo combustion which triggers the nuclear fission
react with U to release energy

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