238. The element which is seen in the rocks of
moon:
(a) Titanium (b) Platinum
(c) Uranium
(d) Nickel
Answer: (a)
239. Which element has the highest electropositivity?
(a) Francium
(b) Caesium
(c) Flourin
(d) Chlorine
Answer: (a)
240. Cobalt ions give ......
colour to glass:
(a) Green
(b) Red
(c) Blue (d) Purple
Answer: (c)
241. Which is not a constituent of Sugar?
(a) Nitrogen (b) Carbon
(c) Oxygen
(d) Hydrogen
Answer: (a)
242. Which metal plays a key role in the synthesis of proteins?
(a) Sodium (b) Magnisium
(c) Calcium (d) Iron
Answer: (b)
243 Marsh Test determines the presence of:
(a) Sulphur (b) Arsenic
(c) Carbon (d) Sodium
Answer: (b)
244. Which of the following is a common constituent of Transistor?
(a) Beryllium (b) Iron
(c) Copper (d) Germanium
Answer: (d)
245. Frederic Wohler made urea from........
(a) Ammonium chloride
(b) Ammonium
Carbonate
(c) Ammonium Oxide (d) Ammonium cyanate
Answer: (d)
246. The catalyst used for the manufacture of Ammonia:
(a) Silver (b) Sodium Chloride
(c) Iron (d) Gold
Answer: (c)
247. Which one of the following is the result of Green House
Effect?
(a) Acid rain (b) Ozone depletion
(c) Air pollution (d) Global warming
Answer: (d)
248. The whitest substance:
(a) Topaz (b)
Diamond
(c) Marble (d)
Titanium dioxide
Answer: (d)
249. Which element has the second highest capacity for oxidation?
(a) Iron (b) Oxygen
(c) Mercury (d) Oxygen
Answer: (d)
250. Dow process is used for the extraction of:
(a) Iron (b) Calcium
(c) Sodium (d) Magnisium
Answer: (d)
251. The second most ductile element:
(a) Copper (b) Iron
(c) Tungsten (d) Silver
Answer: (c)
252. Which metal is contained in Insulin?
(a) Zinc (b)
Magnisium
(c) Lithium (d) Barium
Answer: (a)
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