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Byju's Answer
Standard XII
Chemistry
Acidic Nature vs Percentage S Characters
The correct t...
Question
The correct trend of acidic nature of the following alkynes is:
A
C
H
≡
C
H
>
C
H
3
−
C
≡
C
H
>
C
H
3
C
≡
C
C
H
3
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B
C
H
3
−
C
≡
C
H
>
C
H
≡
C
H
>
C
H
3
C
≡
C
C
H
3
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C
C
H
3
C
≡
C
C
H
3
>
C
H
3
−
C
≡
C
H
>
C
H
≡
C
H
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D
C
H
≡
C
H
>
C
H
3
C
≡
C
C
H
3
>
C
H
3
C
≡
C
H
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Solution
The correct option is
D
C
H
≡
C
H
>
C
H
3
−
C
≡
C
H
>
C
H
3
C
≡
C
C
H
3
As stability of conjugate base is more, greater is the acidic strength
Stability of conjugate base
C
H
≡
C
−
>
C
H
3
(
+
I
)
−
C
≡
C
−
>
C
H
3
−
C
≡
C
−
C
H
⊖
2
Hence, also terminal C is
s
p
3
hybridize so ability to donates
H
+
is very less.
Acidic strength order
C
H
≡
C
H
>
C
H
3
−
C
≡
C
H
>
C
H
3
−
C
≡
C
−
C
H
3
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