Two aromatic compounds having formula C7H8O which are easily identifiable by FeCl3 solution test (violet colouration) are
o-cresol and benzyl alcohol
m-cresol and p-cresol
o-cresol and p-cresol
methyl phenyl ether and benzyl alcohol
Which one of the following methods is used to prepare Me3COEt with a good yield?
Mixing EtONa with Me3CCl
Mixing Me3CONa with EtCl
Heating a mixture of (1:1) EtOH and Me3COH in the presence of conc. H2SO4
Treatment of Me3COH with EtMgI
The ease of dehydrohalogenation of alkyl halide with alcoholic KOH is
3° < 2° < 1°
3° > 2° > 1°
3° < 2° > 1°
3° > 2° < 1°
The correct order of decreasing acidity of nitrophenols will be
m-nitrophenol > p-nitrophenol > o-nitrophenol
o-nitrophenol > m-nitrophenol > p-nitrophenol
p-nitrophenol > m-nitrophenol > o-nitrophenol
p-nitrophenol > o-nitrophenol > m-nitrophenol
Which one of the following properties is exhibited by phenol?
It is soluble in aq. NaOH and evolves CO2 with aq. NaHCO3,
It is soluble in aq. NaOH and does not evolve CO2 with aq. NaHCO3
It is not soluble in aq. NaOH but evolves CO2 with aq. NaHCO3
It is insoluble in aq. NaOH and does not evolve CO2 with aq. NaHCO3
Phenol is bifunctional compound because
It is acidic and contain -OH
It reacts with Na to give phenoxide
It reacts with both Na and Zn to give phenoxide and benzene respectively
Both (a) and (c)
Which of the following has lowest boiling point?
p -nitrophenol
m -nitrophenol
o-nitrophenol
Phenol
C.
o-nitrophenol
Ortho nitophenol shows intramolecular hydrogen bonding, Whereas para nitro phenol shows inter moleculr hydrogen bonding. In intermolecular hydrogen bonding association of molecules take place, but in intramolecular hydrogen bonding there is no such type of association between the molecules. Due to this reason para nitrophenol has higher boiling point than ortho nitro phenol.
One mole of an organic compound A with the formula C3H8O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali, it forms Z . Z answers the iodoform test. The compound A is
propan -2- ol
propan - 1- ol
ethoxyethane
methoxyethane