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Chemistry

Chemistry
A pungent smell often present near the urinals is due to

Sulphur-di- oxide
Ammonia
Urea
Chlorine

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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

B
A
D
C

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Chemistry
Which of the following type of coal has the lowest proportion of volatile matter ?

Lignite
Peat
Bituminous
Anthracite

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Chemistry
The chemical substance present in bones and teeth is

Calcium chloride
Calcium phosphate
Calcium sulphate
Calcium borate

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Chemistry
Nitrogen fixation is a process of

Assimilation of nitrate
Conversion of molecular nitrogen to ammonia
Conversion of organic nitrogen to proteins
Utilisation of nitrogen gas

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Chemistry
Which one is the most reactive gaseous element

Chlorine
Flourine
Iodine
Bromine

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