161 Which one of the following compounds shows intense knocking ? Chemistry Medium Full question → A n-pentane B iso-heptane C iso-octane D n-heptane
162 At low temperature and pressure cracking can be done in presence of catalyst________________? Chemistry Medium Full question → A Al2O3 B Fe2O3 C Al2O3 and SiO2 D Fe2O3 and SiO2
163 Crude oil is blackish coloured liquid produced after the decay of organic matter present between_________________? Chemistry Medium Full question → A earth layer B mountains C sedimentary rocks D rocks
164 Coal is produced after a long time decay of_________________? Chemistry Medium Full question → A animals B fossils C wood D all of the above
165 Rate of reactions of most organic compounds are____________________? Chemistry Medium Full question → A very slow B very fast C slow D no regular character present
166 The organic compounds having very high molecular weight are called _________________? Chemistry Medium Full question → A carboxylic acids B ketones C aldehydes D polymers
167 The property of carbon chain formation is called _________________? Chemistry Medium Full question → A catenation B hybridization C polymerization D solvation
168 First organic compound synthesized in laboratory was _________________? Chemistry Medium Full question → A tartaric acid B ethyl alcohol C methanol D urea
169 The first organic compound was synthesized in laboratory by_________________? Chemistry Medium Full question → A Wohler B Kolbe C Berzilius D Berthelot
170 Pentane and 2-methyl butance have the same_______________? Chemistry Medium Full question → A Boiling point B Melting point C Percentage composition D Structural formula
171 Propene can exhibit________________? Chemistry Medium Full question → A cis-trans isomerism B geometric isomerism C both a & b D none of the above
172 Octane number 2 2 4-trimethyl pentane is________________? Chemistry Medium Full question → A 100 B 90 C 80 D 70
173 Octane number can be improved by________________? Chemistry Medium Full question → A Isomerization B Adding (C2H5)4 Pb C Adding (CH3)4 Pb D All
174 C5H12 has the number of isomers ___________________? Chemistry Medium Full question → A one B two C three D four
175 The general formula of cycloalkene is __________________? Chemistry Medium Full question → A CnH2n B CnH2n+2 C CnH2n-1 D CnH2n-2
176 The structure of ethyne is_________________? Chemistry Medium Full question → A angular B trigonal C linear D trigonal planar
177 Only sigma bonds are present in__________________? Chemistry Medium Full question → A propene B butanoic acid C butanal D ethoxy ethane
178 Which of the following is an amide________________? Chemistry Medium Full question → A R-NH2 B RCONH2 C R – NH – R D C6H5NH2
179 Compound containing benzene ring in their structure are __________________? Chemistry Medium Full question → A aliphatic B aromatic C carboxylic acid D carbohydrates
180 Isomerism which is present only in alkene is__________________? Chemistry Medium Full question → A structural isomerism B metamerism C cis-trans isomerism D both b and c