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KVPY2020ChemistryElectrochemistry

Upon dipping a copper rod, the aqueous solution of the salt that can turn blue is:-

Options

  1. ACa NO 3 2
  2. BMg NO 3 2
  3. CZn NO 3 2
  4. DAgNO 3

Correct answer

D. AgNO 3

Step-by-step solution

2 AgNO 3 + Cu ⟶ Ag + Cu NO 3 2 Metal can reduce that metal cation which is placed below it in reactivity series.

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