Identify the incorrect statements.

P. Chlorine in 100-200 ppm concentrations is used as a disinfectant. Q. Ormeloxifene is used as a contraceptive agent. R. Sodium benzoate and sorbic acid are used as preservatives for food products. S. Aspartame is less potent sweetener and more stable to heating than alitame.

P. Chlorine in the concentration of 0.2 to 0.4 ppm in aqueous solution and sulphur dioxide in very low concentrations, are used as disinfectants. Q. Ormeloxifene is one of the selective estrogen receptor, used as a contraceptive or as a treatment for dysfunctional uterine bleeding. R. Food preservatives prevent spoilage of food due to microbial growth. The most commonly used preservatives include table salt, sugar, vegetable oils and sodium benzoate, C₆H₅COONa. S. Alitame (2000 times sweeter than sucrose) is a high potency sweetener and it is more stable to heating than aspartame (100 times sweeter than sucrose).  Hence both P and S are incorrect.