Science & Technology › Chemistry – UPSC Prelims PYQs
55 questions · 1995–2021 · answers as per the UPSC key · page 2 of 2
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UPSC 1997 · Q113 · Science & Technology › Chemistry · Save
The most reactive among the halogens is
(a) fluorine
(b) chlorine
(c) bromine
(d) iodine
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Answer: (a) fluorine
UPSC 1997 · Q114 · Science & Technology › Chemistry · Save
Which one of the following is paramagnetic in nature?
(a) Iron
(b) Hydrogen
(c) Oxygen
(d) Nitrogen
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Answer: (c) Oxygen
UPSC 1997 · Q116 · Science & Technology › Chemistry · Save
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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Answer: (d) Ethylene glycol
UPSC 1995 · Q101 · Science & Technology › Chemistry · Save
Which one of the following is a mixed fertilizer?
(a) CAM
(b) Urea
(c) Ammonium Sulphate
(d) NPK
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Answer: (d) NPK
UPSC 1995 · Q103 · Science & Technology › Chemistry · Save
The chemical used as a ‘fixer’ in photography is
(a) sodium sulphate
(b) sodium thiosulphate
(c) ammonium persulphate
(d) borax
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Answer: (b) sodium thiosulphate