(i) Explain with reason:
(a) Presence of electron withdrawing group increases the acidic character of phenol.
(b) Solubility of alcohols in water decreases with increase in molecular mass.
(c) Phenol is more acidic than ethanol.
(ii) How would you obtain
(a) picric acid from phenol?
(b) 2-methyl propanol from 2-methyl propene?

How is phenol obtained from benzene ? Explain the acidic character of phenol

(i) Phenol is more acidic than methanol. Give reason. (ii) Convert the following (a) Phenol to p-benzoquinone (b) Aniline to phenol

Describe the mechanism of acid catalysed dehydration of ethanol to yield ethene. How will you convert (1) propene to propan-2-ol? (ii) phenol to 2, 4, 6-trinitrophenol ?

How will you obtain the following from phenol. (i) Salicylaldehyde (ii) Benzene (iii) Picric acid (iv) Nitrophenol (v) Salicylic acid (vi) p-cresol

(ii) Choose the best appropriate explanation from the following (a) To give the sphere a negative charge, we must give it more electrons and this will increase its mass. (b) A positive charge increases the sphere's mass and a negative charge decreases its mass, (c) Charge is conserved, therefore the mass of the object will remain the same.

An organic compound (A) with molecular formula C_8H_8O forms an orange precipitate with 2, 4 dinitrophenyl hydrazine and gives yellow precipitate on heating with iodine in presence of sodium hydroxide. It neither reduces Tollen's reagent nor Fehling solution and it also does not decolourise bromine water or Baeyer's reagent. On drastic oxidation with chromic acid it gives a carboxylic acid (B) having molecular formula C_7H_6O_2 . Identify the compound (A) and (B) and explain in detail the reactions involved