Question

A, B and C are three elements which undergo chemical reaction according to the following equations: A2O3+2B arrow B2O3+2A 3CSO4+2B arrow B2{SO4]3+3C 3CO+2A arrow A2O3+3C. Answer the following questions with reason: a} Which element is most reactive? b} Which element is least reactive? c} What is the type of reaction listed above?

Answer 1

 i) Most reactive element is B as it has replaced both A and C from their compounds

ii) Element C is least reactive as it has been replaced both by A and B. 

Answer 2

Given that,

A, B and C are three elements which undergo chemical reaction.

According to the following equations,

(a). $A_{2}O_{3}+2B\Rightarrow B_{2}O_{3}+2A$

Here, B replaced A

So, B is more reactive than A.

(b). $3CSO_{4}+2B\Rightarrow B_{2}(SO_{4})_{3}+3C$

Here, B replaced C

So, B is more reactive than C.

(c). $3CO_{2}+2A\Rightarrow A_{2}O_{3}+3C$

Here, A replaced C

So, A is more reactive than C.

These reactions are displacement reactions.

Hence, This is required answer.