Which of the following does not give benzoic acid on hydrolysis?
Phenyl cyanide
Benzoyl chloride
Benzyl chloride
Methyl benzoate
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
The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with
PCl3
PCl5
SOCl2 in presence of pyridine
dry HCl in the presence of anhydrous ZnCl2
The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is
methanal
propanal
propanone
ethanal
The reaction involved in the oil of winter green test is salicylic acid product. The product is treated with Na2CO3 solution. The missing reagent in the above reaction is
phenol
NaOH
ethanol
methanol
Out of the compounds below the vapour pressure of (B) at a particular temperature is
higher than that of (A)
lower than that of (A)
higher or lower than (A), depending on the size of the vessel
same as that of (A)
An oxygen containing organic compound upon oxidation forms a carboxylic acid as the only organic product with its molecular mass higher by 14 units. The organic compound is
an aldehyde
a primary alcohol
a secondary alcohol
a ketone
Phenol forms a tribromo derivative, 'X' is
bromine in benzene
bromine in water
potassium bromide solution
bromine in carbon tetrachloride at 0°C