Waxes are esters of
glycerol
long chain alcohols
glycerol and fatty acid
long chain alcohols and long chain fatty acids
Among the following, which is least acidic?
phenol
o-cresol
p-nitrophenol
p-chlorophenol
B.
o-cresol
When an electron attracting group (like -NO2, —Cl) is attached to the phenol ring, it stabilises the negative charge on the oxygen of phenoxide ion. Due to this reason acidic character of phenol increases. But when an electron donating group (like -CH3) is attached to the phenol ring, it destabilises the ring and hence, acidic character of phenol decreases.
Thus, the correct order of acidic character is:
p-nitrophenol > p-chlorophenol > phenol > o-cresol
Anisole can be prepared by the action of methyl iodide on sodium phenate. The reaction is called
Wurtz 's reaction
Williamson's reaction
Fittig's reaction
Etard's reaction
The compound on dehydrogenation gives a ketone. The original compound is
primary alcohol
secondary alcohol
tertiary alcohol
carboxylic acid
The monomers of buna-S rubber are
vinyl chloride and sulphur
butadiene
styrene and butadiene
isoprene and butadiene
Which of the following organic compounds answers to both iodoform test and Fehling's test?
Ethanol
Methanal
Ethanal
Propanone