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Question: Answered & Verified by Expert
A strip of copper is dipped into a colourless solution of the following four salts, which are placed separately in four different test tubes. Which solution will turn Blue?
ChemistryElectrochemistryNEET
Options:
  • A KNO3
  • B ZnSO4
  • C Zn(NO3)2
  • D AgNO3
Solution:
1894 Upvotes Verified Answer
The correct answer is: AgNO3
When a strip of copper is dipped in the solution of silver nitrate, the solution becomes blue.
Cu is placed above Ag in electrochemical series.
2AgNO3+CuCu(NO3)2+2Ag

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