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90011231. An example of a major air pollutant is
A
OxygenB
Carbon monoxideC
HeliumD
Carbon dioxideCorrect Answer: B. Carbon monoxide
90073232. One of the following is used to dissolve noble metals. That is
A
Nitric acidB
Hydrochloric acidC
Sulphuric acidD
Aqua ragiaCorrect Answer: D. Aqua ragia
90026233. Cement is formed by strongly heating a mixture of
A
limestone and graphiteB
limestone and clayC
chalk and graphiteD
clay and graphiteCorrect Answer: B. limestone and clay
90015234. Aspirin is
A
Methoxy benzoic acidB
Methyl SalicylateC
Acetyl Salicylic acidD
Phenyl SalicylateCorrect Answer: C. Acetyl Salicylic acid
90125235. The material used in the manufacture of the lead pencil is
A
GraphiteB
LeadC
CarbonD
MicaCorrect Answer: A. Graphite
90179236. Which of the following is chiefly present in LPG (Liquefied Petroleum Gas)?
A
MethaneB
EthaneC
PropaneD
ButaneCorrect Answer: D. Butane
90181237. Which of the following is used as a lubricant in heavy machines?
A
BauxiteB
SulphurC
PhosphorusD
GraphiteCorrect Answer: D. Graphite
90055238. Hydrogen bomb is based on the principle of
A
controlled fission reactionB
uncontrolled fission reactionC
controlled fusion reactionD
uncontrolled fusion reactionCorrect Answer: D. uncontrolled fusion reaction
90106239. The coating of a thin layer of zinc on steel or iron objects is known as
A
Hot dippingB
TinningC
GalvanisingD
ElectroplatingCorrect Answer: C. Galvanising
90004240. Alum stops bleeding in minor cuts because of
A
solvationB
emulsionC
dialysisD
coagulationCorrect Answer: D. coagulation
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