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Chemistry

Chemistry
Ultra purification of a metal is done by :

Leaching
Zone melting
Slugging
Smelting

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Chemistry
Which one of the following metals pollutes the air of a city having large number of automobiles?

Copper
Lead
Cadmium
Chromium

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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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Chemistry
The gas produced in marshy places due to decomposition of vegetation is

Carbon dioxide
Carbon monoxide
Sulphur dioxide
Methane

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Chemistry
Polythene is polymer of

Propylene
Acetylene
Ethylene
Aniline

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Chemistry
Gypsum is used for improvement of:

Acidic soils
Podsols
Alkaline soils
Saline soils

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MORE MCQ ON Chemistry

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