Question

A copper coin is immersed in a solution of silver nitrate for some time. What will happen to the coin and colour of the solution?

• A. Copper coin will dissolve in the solution. The colour of the solution will not change.
• B. There will be no change in copper coin and in the colour of solution.
• C. There will be no change in copper coin. The colour of the solution will change from colourless to blue.
• D. Copper coin will dissolve in the solution. The colour of the solution will change from colourless to blue.

Answer 1

The correct option is D

Copper coin will dissolve in the solution. The colour of the solution will change from colourless to blue.

When copper coin is kept immersed in a solution of silver nitrate, it will displace silver from its solution because copper is more reactive than silver. Thus, copper coin will dissolve in the solution. The colour of the solution will change from colourless to blue.

Cu + AgNO3 → CuNO3+ Ag