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Question

Beakers A, B, and C contain zinc sulphate, silver nitrate, and ferrous sulphate solutions respectively. Copper pieces are added to each beaker. Blue colour will appear in case of:

A
Beaker A
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B
Beaker B
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C
Beaker C
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D
All the beakers
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Solution

The correct option is B Beaker B
Copper is less reactive than zinc and iron, but is more reactive than silver and displaces silver from its salt solution.

AgNO3+CuCuNO3+Ag

Hence, blue colour solution (Copper nitrate) will be formed in the beaker B.

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