Answer:
(a) If an iron nail is kept in
CuSO4 solution, then iron nail gets brown coating due to Cu deposition
and the?
(1/2)
Solution turns greenish due to
the formation of FeSO4. (1/2)
It is because, Fe being more
reactive than Cu, displaces Cu from CuSO4 solution. (1)
(b) M is copper (Cu) as it is
less reactive than hydrogen and gives. black product, copper oxide (CuO) with
oxygen.
(1/2)
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