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Chemistry

Chemistry
The gas used to extinguish fire is

Nitrogen
Carbon dioxide
Neon
Carbon monoxide

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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

D
B
A
C

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Chemistry
Catalytic converters are generally made from :

Transition metals
Carbon
Hydrogen
Alkaline metals

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Chemistry
Which of the following chemicals is responsible for depletion of ozone layer in the atmosphere?

Nitrous oxide
Carbon dioxide
Chlorofluorocarbons
Sulphur dioxide

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Chemistry
The name of plastic polymer from which combs, toys, bowls etc., can be made, is

Metallic polysulphides
Teflon
Polyurethane
Polystyrene

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Chemistry
Denatured spirit is ethanol mixed with

Pyridine
Kerosene
Water
Petrol

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