Question

02)
Freshly prepared iron sulphate solution was taken in each of four test tubes. Strips of
Cu, Fe, Zn and Al were introduced in different test tubes, a black residue was
observed in two test tubes. The pair of inetals forming the residue is :
(a) Cu and Zn
(b) Al and cu
(c) Fe and Al
(d) Zn and Al

Answer 1

Explanation:

option a

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