(d) Berthlot
Ans: (a)
150. The fristly synthesized organic compound in the laboratory is :
(a) formic acid
(b) acetic acid
(c) urea
(d) methane
Ans: (c)
151. The four valencies of carbon atom are directed around the tetrahedral edges and carbon is confined at the centre
in the organic compounds, this idea was firstly conceived by :
(a) J. J. Thomson
(b) Albert Einsten
(c) Michael Faraday
(d) Level & Wanthoff
Ans: (d)
152. The most abundantly found organic compound in the nature is:
(a) glucose
(b) fructose
(c) sucrose
(d) cellulose
Ans: (d)
153. The process through which camphor is purified:
(a) sublimation
(b) distillation
(c) chromatography
(d) vacuum distillation
Ans: (a)
154. Which of the following substance is used in the form of solder in the soldering process? [IAS [Pre)2006]
(a) Aluminium and Iron
(b) Lead and Tin
(c) Aluminium and Lead
(d) Iron and Tin
Ans: (b)
155. The difference appears in the molecular formula of every adjacent homologous member of series:
(a) CH2
(b) CH4
(c) C2H4
(d) C2H6
Ans: (a)
156. Which of the following is obtained by the fractional distillation of the wood:
(a) acetic acid
(b) sulphuric acid
(c) pyrolegneous acid
(d) formic acid
Ans: (c)
157. The organic compounds whose molecular formula are same but structural formula are different, are called:
(a) isotopes
(b) isobars
(c) homologous
(d) allotropes
Ans: (c)
158. The normal butane and iso butane are: [CDS 2002]
(a) optical isomer
(b) chain isomer
(c) positional isomer
(d) functional isomer
Ans: (b)
159. The petrol which is used in the motor vehicles is basically the mixture of
(a) alcohols
(b) carbohydrates
(c) hydrocarbons
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