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Standard XII
Chemistry
Halogenation of Alpha Carbon
A compound th...
Question
A compound that shows positive iodoform test is:
A
2-pentanone
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B
3-pentanone
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C
3-pentanol
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D
1-pentanol
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Solution
The correct option is
A
2-pentanone
A compound that shows positive iodoform test is
2
−
p
e
n
t
a
n
o
n
e
C
H
3
C
O
C
H
2
C
H
2
C
H
3
.
Positive iodoform test is given by
m
e
t
h
y
l
k
e
t
o
n
e
s
. The group
C
H
3
C
O
is a
m
e
t
h
y
l
k
e
t
o
n
e
.
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Similar questions
Q.
Pentanone and pentanol are isomers.
Q.
Out of the following compounds, the number of compounds which give a positive haloform test is
(a) Ethanol
(b) Methanol
(c) Acetaldehyde
(d) Acetone
(e) Formaldehyde
(f) Propanaldehyde
(g) 3-pentanone
(h) 2-pentanone
Q.
Which one of the following reagents will give a positive test with 3-pentanone?
Q.
Among the following, the one that gives positive Iodoform test upon reaction with
I
2
/
N
a
O
H
Q.
Which of the following tests can be used to distinguish between two isomeric ketones: 3- pentanone and 2- pentanone?
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