Reaction of ethyl formate with excess of CH3MgI followed by hydrolysis gives
n-propyl alcohol
isopropyl alcohol
acetaldehyde
acetone
Which among the following alcohols is most reactive with sodium wire?
Ethanol
2-Propanol
2-Butanol
2-Methyl-2-butanol
In Williamson's synthesis, ethoxyethane is prepared by :
passing ethanol over heated alumina
heating sodium ethoxide with ethyl bromide
treating ethyl alcohol with excess of H2SO4 at 430-440 K
heating ethanol with dry Ag2O
The correct order of reactivity of phenyl Magnesium bromide with the following compound is:
(II)> (III)> (I)
(I)> (III)> (II)
(II)> (I)> (III)
(I)> (II)> (III)
The alcohol that produces turbidity immediately with ZnCL2 + conc. HCl at room temperature:
1- hydroxybutane
2- hydroxybutane
2- hydroxy -2- methyl propane
1- hydroxy -2- methyl propane
The compound which reacts faster with Lucas reagent is
butan-1-ol
butan-2-ol
2-methyl-propan-1-ol
2-methyl propan-2-ol
D.
2-methyl propan-2-ol
Tertiary alcohols react faster with Lucas reagent. They give turbidity with Lucas reagent (conc. HCl + anhyd. ZnCl2) at once. Hence, 2-methyl-propan-2-ol will react with Lucas reagent faster.
In the given reaction ,
R-OH + HX RX + H2O
the order of reactivity of alcohols is:
tertiary < secondary < primary
tertiary > secondary > primary
tertiary < secondary > primary
secondary > primary > tertiary