Question

A,B and C are three elements which undergo chemical reactions according to the following equations i) A2O3 + 2 B B2O3 + 2A ii) 3CSO4 + 2B B2 (SO4)3 + 3C iii) 3CO + 2A A2O3 +3C Answer the following questions with reasons a) Which element is the most reactive? b) Which element is the least reactive? c) What is the type of reactions listed above?

Answer 1

Most reactive element is B.
Reason :
Because of the higher reactivity as compared to that of A and C. Element B has replaced both A and C in reaction (1) and (2) . Therefore it lies above A and C in the reactivity series.