Graduate Pharmacy Aptitude Test (GPAT) 2015 Solved Paper

Which of the following statements about bentonite are CORRECT
(P) Gycerin is used to pre-wet the bentonite prior to mixing with water to form its gel
(Q) Aqueous bentonite suspensions retain their viscosity above pH‌6 but are precipitated by acids
(R) MgO increase gel formation while alcohol in significant amounts can precipitate bentonite gel
(S) Betonite exhibits rheopexy