Monday, December 17, 2007

Past JEE Questions Ch.22 Alkenes


Baeyer's reagent is
a) alkaline potassium permanganate solution
b) acidified potassium permanganate solution
c) neutral potassium permanganate solution
d) acqueous bromine solution


anti-markonikov addition of HBr is not observed in
a) propene
b) butene
c) 2-butene
d) 2-pentene

Dipole moment is shown by

a) 1,4 dichlorobenzene
b) cis-1,2-dichloroethene
c) trans-1,2-dichloroethene
d) 1,2-dichloro-2-pentene

Answer b and d


4. of the following compounds, whihc will have a zero dipole moment

a) 1,1 dichloroethylene
b) cis-1,2-dichlorethylene
c) trans-1,2-dichloroethylene
d) none of these compounds

answer c


5.1-chlorobutane on reaction with alcoholic potash gives
a) 1-butene
b) 1-butanol
c) 2-butene
d) 2-butanol

answer a


6. The molecules that will have dipole moment are

a) 2,2-dimethylpropane
b) trans-2-pentene
c) cis-3-hexene
d) 2,2,3,3,-tetrametylbutane

answer b and c.


Which of the following has the smallest heat of hydrogenation per mole?
a) 1-butene
b) trans-2-butene
c) cis-2-butene
d) 1,3-butadiene

answer d

Which of the following compounds will show geometric isomerism?
a) 2-Butene
b) Propene
c) 1-Phenylpropene
d) 2-Methyl-2-butene


Which of the following compounds will exhibit geometric isomerism?
a) 1-phenyl-2-butene
b) 3-phenyl-1-butene
c) 2-phenyl-1-butene
d) 1,1-Diphenyl-1-propene

JEE Question 2007 paper II

Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on further treatment with aqueous KOH yields compound F. Compound F is

Options given as pictures

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