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Standard XII
Chemistry
Structural and Physical Properties of Carbonyls
Why is it tha...
Question
Why is it that in the case of alpha diketones, equilibrium lies almost completely towards keto form?
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Q.
Give reasons:-
(a)
H
C
H
O
is more reactive than
C
H
3
−
C
H
O
towards addition of
H
C
N
.
(b)
p
K
a
of
O
2
N
−
C
H
2
−
C
O
O
H
is lower than that of
C
H
3
C
O
O
H
(c) Alpha hydrogens of aldehydes and ketones is acidic in nature.
Q.
Secondary prefix for Ketone is Keto or oxo.
Q.
The double bond in aldehydes and ketones is reactive towards nucleophilic reagents like CN - whereas that in an alkene is not.
Q.
Which of the following has the highest percentage of enol form in Keto-enol equilibrium?
Q.
Assertion :A
β
keto acid is decarboxylated to a ketone on simple heating , even in absence of sodalime catalyst. Reason: A resonance stabilized carbonion is formed
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Structural and Physical Properties of Carbonyls
Standard XII Chemistry
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