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Chemistry

Chemistry
The most abundant rare gas in the atmosphere is

He
Ne
Xe
Ar

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Chemistry
Among the following the hardest metal is

Iron
Platinum
Tungsten
Gold

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Chemistry
The 'solid waste' is also known as

Scrubber
Toxic waste
Sedge
Sludge

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Chemistry
Commercial nitric acid is coloured because it contains dissolved :

Oxygen
Nitrogen dioxide
Coloured impurities
Nitrous oxide

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Chemistry
The graphite rods in the nuclear reactor

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

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Chemistry
Match the List-I with List-II and select the correct answer using the codes given belowList-I (Vitamin)List-II(Chemical compound)F.Vitamin A1.ThiaminG.Vitamin B12.RetinolH.Vitamin C3.Ascorbic acidJ.Vitamin E4.TocopherolCodes :FGHJA.4132B.2314C.4312D.2134

A
D
B
C

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