Question

24. Four metals are arranged according to the decreasing tendency of liberating hydrogen gas from dilute a id as follows: Ca. Zn, Fe.(H).Cu. In which of the following cases will a precipitate of the less react ve metal be obtained? a) When zinc is added to an aqueous solution of copper sulfate b) When iron is added to an aqueous solution of calcium chloride c) When copper is added to an aqueous solution of calcium chloride d) When iron is added to an aqucous solution of zinc sulfate.​

Answer 1

Answer:

Option A

Explanation:

i) Zinc being more reactive than copper will displace it and form ZnSO4.

CuSO4 + Zn = ZnSO4 +Cu (precipitate)

ii) Iron being less reactive than Calcium won't

displace Calcium.

iii) Again Copper being less reactive than won't displace it.

iv) Iron is less reactive than zinc.

Answer 2

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