Iodoform can be prepared from all, except
propan-2-ol
butan-2-one
propan-1-ol
acetophenone
C.
propan-1-ol
Iodoform test is need for charactersing compounds containing CH3CO or CH3CHOH- which can be easily oxidised to CH3CO group by halogens.
In propan-1-ol (CH3-CH2-CH2OH), CH3-CHOH- group is not present, so it will not give iodoform reaction.
Which of the following reagent cannot be used to oxidise primary alcohols to aldehydes?
Pyridinium chlorochromate
KMnO4 in acidic medium
CrO3 in anhydrous medium
Heating in presence of Cu at 573K
Reduction of ketones cannot be carried out with which of the following reagents?
Sodium borohydride or lithium aluminium hydride
Zinc amalgam and conc.HCl
Hydrazine and KOH in ethylene glycol
Hydrogen in presence of palladium in barium sulphate and quinoline
Toluene reacts with halogen in presence of iron (III) chloride giving ortho and para halo compounds. The reaction is
nucleophilic substitution reaction
free radical addition reaction
electrophilic elimination reaction
electrophilic substitution reaction
Lower members of aliphatic carboxylic acid are soluble in water. This is due to
formation of hydrogen bonds with water
due to london forces
water is non electrolyte
Van der- Waal's interaction with water molecules.
The most appropriate reagent to distinguish between acetaldehyde and formaldehyde is :
Fehling's solution
Tollen's reagent
Schiffs reagent
iodine in presence of base
The conversion of acetophenone to acetanilide is best accomplished by using :
Beckmann rearrangement
Curtius rearrangement
Lassen rearrangement
Hofmann rearrangement
Cannizzaro's reaction is an example of auto oxidation
It is a reaction answered by only aldehydes containing a hydrogen
It is a reaction answered only by aromatic aldehydes.
it is a reaction answered by all aldehydes
it is a reaction answered by all aldehydes