Question

# Beakers $$A,\ B$$ and $$C$$ contain zinc sulphate, silver nitrate and iron (II) sulphate solutions respectively. Copper pieces are added to each beaker. The blue colour will appear in case of:

A
beaker A
B
beaker B
C
beaker C
D
all the beakers

Solution

## The correct option is A beaker $$B$$Given that, Beaker, $$A = ZnSO_4$$$$B = AgNO_3$$$$C = FeSO_4$$When copper pieces added in each beaker, only less reactive solution will be displaced by $$Cu$$.According to reactivity series $$Cu$$ is more reactive than silver and less reactive than $$Zn$$ and $$Fe$$.$$2Cu + \underset{Solution}{\underset{Beaker (B)}{2AgNO_3}} \rightarrow \underset{Blue \ colour}{Cu(NO_3)_2} + 2Ag$$Chemistry

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