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Byju's Answer
Standard XII
Chemistry
Tautomerism
Which of the ...
Question
Which of the following exhibit cis -trans isomerism?
A
propene
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B
1 -butene
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C
2 -butene
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D
benzene
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Solution
The correct option is
D
2 -butene
Cis-2-butene has both methyl groups on the same side of the molecule.
Trans-2-butene has the methyl groups on opposite sides of the molecule.
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Similar questions
Q.
There are some alkenes are given as follow:
2-methyl propene, cis-2-butene, trans-2-butene
Which of the following is the correct order for increasing order of reactivity for acid catalyzed hydration?
1) trans-2-butene< cis-2-butene < 2-methyl propene
2) cis-2-butene< trans-2-butene < 2-methyl propene
3) 2-methyl propene < trans-2-butene < cis-2-butene
Q.
Which of the following statements is not true regarding the cis and trans isomers of 2-butene ?
Q.
Cis-
2
-butene and trans-
2
-butene are :
Q.
Out of cis-2 butene and trans-2-butene, which one has the lowest melting point ?
Q.
(i) Cis - 2 - butene
→
trans-2-butene,
△
H
1
(ii) Cis - 2 - butene
→
1 - butene,
△
H
2
(iii) Trans-2-butene is more stable than cis - 2 - butene.
(iv) Enthalpy of combustion of 1 - butene,
△
H
=
−
649.8
k
c
a
l
/
m
o
l
(v)
9
△
H
1
+
5
△
H
2
=
0
(vi) Enthalpy of combustion of trans 2 - butene,
△
H
=
−
647.0
k
c
a
l
/
m
o
l
.
The value of
△
H
1
and
△
H
2
in kcal/mol are
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