Question

Given below is a set of reactions that involve metals P, Q, R and S. With this information, find out
the least active metal? (X represents oxygen)
PX+Q→ No reaction
QX+R → No reaction
RX +S → SX +R​

Answer 1

Answer:

R

Explanation:

R is the only metal that is being displaced by another metal. R also can't displace Q. So R is the least reactive