UPSC 1997 › Science & Technology › Chemistry
7 questions · 1997 · answers as per the UPSC key
UPSC 1997 · Q27 · Science & Technology › Chemistry · Save
Which one of the following was used as a chemical weapon in the First World War?
(a) Carbon monoxide
(b) Hydrogen cyanide
(c) Mustard gas
(d) Water gas
Show answer
Answer: (c) Mustard gas
UPSC 1997 · Q104 · Science & Technology › Chemistry · Save
Which one of the following is present in the largest amount in terms of per cent by mass in the earth’s crust?
(a) Silicon
(b) Oxygen
(c) Carbon
(d) Calcium
Show answer
Answer: (b) Oxygen
UPSC 1997 · Q111 · Science & Technology › Chemistry · Save
The characteristic odour of garlic is due to
(a) a chloro compound
(b) a sulphur compound
(c) a fluorine compound
(d) acetic acid
Show answer
Answer: (b) a sulphur compound
UPSC 1997 · Q112 · Science & Technology › Chemistry · Save
Which one of the following is an active component of oil of clove?
(a) Menthol
(b) Eugenol
(c) Methanol
(d) Benzaldehyde
Show answer
Answer: (b) Eugenol
UPSC 1997 · Q113 · Science & Technology › Chemistry · Save
The most reactive among the halogens is
(a) fluorine
(b) chlorine
(c) bromine
(d) iodine
Show answer
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
Show answer
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
Show answer
Answer: (d) Ethylene glycol