Question

Zinc is more active than cobalt and iron but less active than aluminum. Cobalt is more active than nickel but less active than iron. Which of the following correctly lists the elements in order of increasing activity?
a) Zn < Al < Co < Ni < Fe
b) Co < Ni < Fe < Zn < Al
c) Fe < Ni < Co < Al < Zn
d) Ni < Co < Fe < Zn < Al
e) Ni < Fe < Co < Zn < Al

Answer 1

Answer:

Option D

Explanation:

For the first statement, the order is:

=> Co < Fe < Zn < Al

For the second statement it is,

=> Ni < Co < Fe

So, combining the order becomes:

=> Ni < Co < Fe < Zn < Al