It consists of three cases followed by questions. There are a total of 12 questions (Q. No. 49 to 60 ) in this section. Attempt any 10 questions from this section. The first attempted 10 questions would be evaluated. P-Did not react eiter with cold or hot water but reacted with steamQ- Reacted with hot water and the metal started floatingR - Reacted violently with cold waterS- Did not react with water at allBased on the above observation answer the following:Case-I:A student, took four metals $P, Q, R$, and S and carried out different experiments to study the properties of metals. Some of the observation were:- All metal could not be cut with knife except metal R.- Metal P combined with oxygen to form an oxide $\mathrm{M}_2\mathrm{O}_3$ which reacted with both acids and bases.- Reaction with water.