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Difference between phenol and alcohol
Property
Phenol (C6H5OH)
Alcohol (C2H5OH)
Odour
Typical phenolic odour
Pleasant alcoholic odour
Nature, reaction with alkali
Acidic, dissolves in sodium hydroxide forming sodium phenoxide.
Neutral, no reaction with alkalies.
Reaction with neutral FeCl3
Gives violet colouration due to formation of complex compound.
No reaction.
Reaction with halogen acids
No reaction with halogen acids.
Forms ethyl halides.
Oxidation
Pink or brown colour due to formation of quinone and phenoquinone.
Undergoes oxidation to give acetaldehyde and acetic acid.
Reaction with HCHO
Forms polymer (bakelite).
Liebermann's nitroso reaction
Positive.
Does not show.
Coupling with benzene diazonium chloride
Forms azo dye.
Does not form any dye.
Reaction with PCl5
Mainly forms triphenyl phosphate.
Forms ethyl chloride
Iodoform test
For a given value of quantum number l , the number of allowed values of is given by: (1) l+2 (2) 2l+2 (3) 2l+ 1 (4)
d orbital
The set of quantum numbers not applicable for an electron in an atom is: (1) n= 1, l=1, m 1 = 1, m s = +1/2 (2) n= 1, l=0, m 1 = 0, m s = +1/2 (3) n= 1, l=0 m
resonating structure of p-nitro aniline
How do we extract group one alkali metals?
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