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Which of the following reactions are not feasible?
Question

Which of the following reactions are not feasible?

A.

Zn + CaSO4

B.

Mg + ZnSO4

C.

Al + CuSO4

D.

PbSO4 + Fe

Correct option is A

The correct answer is Zn + CaSO4.
This reaction is not feasible.
Zinc is more reactive than calcium, so it can not displace calcium from calcium sulphate.

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