WAEC - Chemistry (2001 - No. 23)
Given that the order of reactivity of four metals is P>Q>R>S, which of the following reactions is feasible?
S + P+ → P + S +
Q + S+ → S + Q+
R + P+ → P + R+
S + Q+ → Q + S+
Explicació
When a metal gives out an electron,it becomes positively charged. The most reactive metal is P, but from the equations given in the options, P should become P+ once it gives out an electron but no option as such. Then we opt for the next most reactive which is Q. If Q gives out an electron, it becomes Q+ while S is the less reactive. Option B is feasible.