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Byju's Answer
Standard XII
Chemistry
Methods for Ester Synthesis
Which of the ...
Question
Which of the following alcohol gives Iodoform test?
A
methanol
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B
propan-2-ol
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C
pentan-3-ol
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D
Carbinol
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Solution
The correct option is
A
propan-2-ol
The compounds which give positive are the one with alpha-methyl groups.
To be more precise, Ethanal(Acetaldehyde) and methyl ketones.
Ethanal is the only aldehyde which gives a positive
iodoform test
. Thus, ketone and aldehyde with structure
−
C
O
C
H
3
also show positive results.
propan-2-ol is
C
H
3
−
C
H
(
O
H
)
−
C
H
3
thus it will have
−
C
O
C
H
3
group and hence gives a positive iodoform test.
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