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Tardigrade
Question
Chemistry
Arrange the following alkyl halides in order of dehydrohalogenation; C2H5I,C2H5Cl,C2H5Br,C2H5F
Q. Arrange the following alkyl halides in order of dehydrohalogenation;
C
2
H
5
I
,
C
2
H
5
Cl
,
C
2
H
5
B
r
,
C
2
H
5
F
2954
206
NTA Abhyas
NTA Abhyas 2020
Haloalkanes and Haloarenes
Report Error
A
C
2
H
5
F
>
C
2
H
5
Cl
>
C
2
H
5
B
r
>
C
2
H
5
I
19%
B
C
2
H
5
I
>
C
2
H
5
B
r
>
C
2
H
5
Cl
>
C
2
H
5
F
67%
C
C
2
H
5
I
>
C
2
H
5
Cl
>
C
2
H
5
B
r
>
C
2
H
5
F
14%
D
C
2
H
5
F
>
C
2
H
5
I
>
C
2
H
5
B
r
>
C
2
H
5
Cl
0%
Solution:
As with the increase in size
X
−
bond length increases but bond strength decreases so reactivity increases. As size increases as
F
−
<
C
l
−
<
B
r
−
<
I
−
.
Hence reactivity order is
C
2
H
5
I
>
C
2
H
5
B
r
>
C
2
H
5
Cl
>
C
2
H
5
F