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Question

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

A
4.0
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B
4.00
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C
4
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Solution

All organic compounds which either have a CH3CO group or a CH3CH(OH) group answers the haloform test
(a) Ethanol (positive)
(b) Methanol (negative)
(c) Acetaldehyde (positive)
(d) Acetone (positive)
(e) Formaldehyde (negative)
(f) Propanaldehyde (negative)
(g) 3-pentanone (negative)
(h) 2-pentanone (positive)

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