Question #e46a5

1 Answer
Sep 16, 2017

No, check explanation to know why.


Activity series, is arranged in the form of decreasing reactivity. (From higher reactivity (above) to lower reactivity (below))

In reactions, an element can replace the other only if it is more reactive than the element being replaced, so according to this, elements above hydrogen are the only ones which can replace hydrogen in both acids and water.

Let us take for example potassium K (it can replace hydrogen in water and acids), however copper, cannot replace hydrogen in neither water nor acids since it lies below hydrogen, and therefore has lower activity.

It is easy to recognize a metal that can replace hydrogen in acids, it just have to lie above hydrogen, but to replace hydrogen in water, it has to be highly reactive.