Question

Which of the following is the correct arrangement of metals in the increasing order of their reactivity?

• A.
  Fe < Mg < Ca < K
• B.
  Mg < Al < Na < Ca
• C.
  Cu < Pb < Zn < Fe
• D.
  Pb < H < Fe < Al

Answer 1

The correct option is A

Fe < Mg < Ca < K
The reactivity series is a list of metals arranged in the order of their decreasing activities. The correct order of reactivity of metals is as follows:

$K>Na>Ca>Mg>Al>Zn>Fe>Pb>\left[H\right]>Cu$

Hence, the correct answer is option (a).