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Question Question 4(2019)
Arrange the following according to the instructions given in the bracket: K, Pb, Ca, Zn
[In the increasing order of reactivity]
Pb < Zn < Ca < K
Arrange the following according to the instructions given in the bracket: K, Pb, Ca, Zn
[In the increasing order of reactivity]
Pb < Zn < Ca < K