Question

Which among the following is the most reactive metal?
A. copper
B. calcium
C. iron
D. magnesium

Answer 1

Answer:

B. calcium.

Explanation:

it is the 3rd highest after pottasium.

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Answer 2

B. calcium

Explanation:

An element that is more reactive will displace a less reactive metal. So looking at the reactivity series, we find the order of the given metals based on their reactivity. The order of the given elements in the reactivity series is Calcium, Magnesium, Iron and copper,  with calcium being the most reactive and copper being the least reactive.  

Option B is the answer.