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

Answer 1

All organic compounds which either have a $C{H}_{3}CO-grouporaC{H}_{3}CH\left(OH\right)-group$ 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)