Question

Please answer th 22nd question.

Answer 1

D is the answere i hope it helps u ok

Answer 2

see the question asks to arrange in decreasing order according to their reactivity


in the first beaker cuso4 or copper carbonate is kept . then iron nails are put in it . in a displacement reaction are more reactive metal displaces a less reactive metal from its salt solution .since iron is more reactive than copper it replaces copper from its solution and copper is formed


sines zinc is more reactive than iron so there will be no reaction as iron is not more reactive than zinc