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Chemistry

Chemistry
Quartz is a crystalline form of

Alumina
Silica
Limestone
Glass

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Chemistry
The chief constituent of natural gas is:

Nitrogen
Propane
Methane
Helium

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Chemistry
The chemical used in embalming biological materials is

Gaseous formaldehyde
Ethylene glycol
Formaldehyde in water
Formaldehyde in methanol

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Chemistry
The most pure form of Carbon among the options is

Wood Charcoal
Lampblack
Graphite
Anthracite

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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
C
B
D

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Chemistry
The depletion of Ozone layer is mainly due to

Volcanic eruptions
Aviation fuels
Radioactive rays
Chlorofluorocarbons

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MORE MCQ ON Chemistry

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