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90131181. The National Chemical Laboratory (India) is located in
A
MumbaiB
BangaluruC
HyderabaD
PuneCorrect Answer: D. Pune
90163182. What particles move around the nucleus of an atom and are negatively charged?
A
ElectronsB
ProtonsC
PositronsD
NeutronsCorrect Answer: A. Electrons
90042183. Extensively used nitrogenous fertilizer is
A
Ammonium nitrateB
UreaC
Ammonium sulphateD
Nitro-limeCorrect Answer: B. Urea
90059184. In the upper layer of atmospheric ozone is formed by
A
the action of ultraviolet rays on oxygenB
the combination of oxygen moleculesC
subjecting oxygen to high pressureD
the action of nitrogen on oxy-gen in the atmosphereCorrect Answer: A. the action of ultraviolet rays on oxygen
90185185. Which of the following metals causes Itai-Itai disease?
A
CadmiumB
ChromiumC
CobaltD
CopperCorrect Answer: A. Cadmium
90090186. Sodium bicarbonate is commercially known as
A
Washing sodaB
Baking sodaC
Caustic sodaD
Soda-limeCorrect Answer: B. Baking soda
90174187. Which of the following gases is mixed with oxygen for breathing by divers in aqualungs?
A
MethaneB
Nitrogen.C
HeliumD
HydrogenCorrect Answer: B. Nitrogen.
90195188. Which one of the following is used as a sowing agent in the preparation of soft drinks?
A
Phosphoric acidB
Phosphorus acidC
Salicylic acidD
Boric acidCorrect Answer: A. Phosphoric acid
90206189. White phosphorus is always kept under
A
benzeneB
keroseneC
etherD
waterCorrect Answer: D. water
90069190. Name two elements that find wide application in transistor industry
A
Silicon and GermaniumB
Carbon and PlatinumC
Iridium and GermaniumD
Tungsten and PlatinumCorrect Answer: A. Silicon and Germanium
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