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Chemistry

Chemistry
Which among the following is used as a catalyst in the production of high octane fuels?

HF
HNO3
H2SO4
HCl

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Chemistry
Which of the following is very reactive and kept in kerosene?

Sodium
Bromine
Potassium
Iodine

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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
A
C
B

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Chemistry
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

1/8
1/4
1/3
1/6

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Chemistry
Rusting of iron takes place due to

Oxidation
Corrosion
Carbonation
Exfoliation

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Chemistry
Bleaching powder is used in drinking water as a/an

Disinfectant
Antibiotic
Coagulant
Antiseptic

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