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)
C.
(II)> (I)> (III)
Among aldehyde and a ketone, aldehydes are more electrophilic as in ketones. If charge on carbonyl carbon is decreased by +I effect of both alkyl groups.
Moreover in the tetrahedral intermediate aldehydes have less steric repulsion than ketone and aldehydes increases the--ve charge on oxygen less in comparison to ketmes.
Based on the above the order of reactivity is:
(II) > (I) > (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
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