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Byju's Answer
Standard XII
Chemistry
Distinguishing Test of Terminal and Non Terminal Alkynes
1, 2-Dibromoe...
Question
1
,
2
-Dibromoethane on treatment with
X
moles of
N
a
N
H
2
followed by treatment with
C
2
H
5
B
r
gives a butyne. The value of
X
is:
A
3.0
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B
3.00
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C
3
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Solution
Only
3
moles
of
N
a
N
H
2
will be required.
Reaction will proceed as follows:
H
2
B
r
|
C
−
B
r
|
C
H
2
2
N
a
N
H
2
−
−−−−
→
H
C
≡
C
H
N
a
N
H
2
−
−−−−
→
H
C
≡
C
−
N
a
+
H
C
≡
C
−
N
a
+
C
2
H
5
B
r
−
−−−−
→
H
C
≡
C
−
C
H
2
−
C
H
3
Butyne
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