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Chemistry

Chemistry
What is the atomic number of mercury

80
32
63
41

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Chemistry
Gypsum is used for improvement of:

Acidic soils
Podsols
Alkaline soils
Saline soils

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Chemistry
The graphite rods in the nuclear reactor

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

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Chemistry
Soldering of two metals is possible because of the property of :

Surface tension
Viscosity
Osmosis
Cohesion

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Chemistry
The product, 9-nitroanthracene is obtained from anthracene by the action of

Nitric acid in excess
Nitric acid and acetic anhydride
Nitric acid and acetic acid
Nitric acid and ethyl alcohol

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Chemistry
The drug ‘Marijuana’ is a

Hallucinating substance
Sedative
Tranquillizer
Mental stimulant

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