The most reactive among the halogens is
- (a)fluorine
- (b)chlorine
- (c)bromine
- (d)iodine
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Official answer(a) fluorine
Chemistry
55 questions in Science & Technology.
Asked in 1997, 1995
Which one of the following is paramagnetic in nature?
- (a)Iron
- (b)Hydrogen
- (c)Oxygen
- (d)Nitrogen
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Official answer(c) Oxygen
Which one of the following is used as an anti-freeze for the automobile engines?
- (a)Propyl alcohol
- (b)Ethanol
- (c)Methanol
- (d)Ethylene glycol
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Official answer(d) Ethylene glycol
101. Which one of the following is a mixed fertilizer?
- (a)CAM
- (b)Urea
- (c)Ammonium Sulphate
- (d)NPK
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Official answer(d) NPK
103. The chemical used as a ‘fixer’ in photography is
- (a)sodium sulphate
- (b)sodium thiosulphate
- (c)ammonium persulphate
- (d)borax
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Official answer(b) sodium thiosulphate