Aldehydes, Ketones and Carboxylic Acids

Reaction of iso-propylbenzene with O2 followed by the treatment with H3O+ forms phenol and a by-product P. Reaction of P with 3 equivalents of Cl2 gives compound Q. Treatment of Q with Ca(OH)2 produces compound R and calcium salt S. The correct statement(s) regarding P, Q, R and S is(are)

1. Reaction of P with R in the presence of KOH followed by acidification gives [figure]
2. Reaction of R with O2 in the presence of light gives phosgene gas
3. Q reacts with aqueous NaOH to produce Cl3CCH2OH and Cl3CCOONa
4. S on heating gives P