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MHT CET Medical202621 April 2026Morning ShiftChemistryElectrochemistryActual

Which of the following elements has positive standard reduction potential?

Options

  1. AAl
  2. BSn
  3. CCu
  4. DZn

Correct answer

C. Cu

Step-by-step solution

The standard reduction potentials of the given elements are: E^ _ Al ³⁺/ Al = -1.66 V E^ _ Sn ²⁺/ Sn = -0.14 V E^ _ Cu ²⁺/ Cu = +0.34 V E^ _ Zn ²⁺/ Zn = -0.76 V Copper (Cu) is the only element among the given options that has a positive standard reduction potential. Answer: Cu

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