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KCET2017ChemistryBiomolecules

The standard reduction potential at 298 ~K for the following half cell reaction Z n²⁺(a q)+2 e⁻ Z n(s) ; E^ = -0.762 VC r³⁺(a q)+3 e⁻ C r(s) ; E^ = 0.740 V2 H⁺(a q)+2 e⁻ H₂(g) ; E^ = 0.0 VF₂(g)+2 e⁻ 2 F⁻(a q) ; E^ = 2.87 V Which of the following is strongest reducing agent ?

Options

  1. A( Z n(s) )
  2. B( C r(s) )
  3. C( H₂(g) )
  4. D( F₂(g) )

Correct answer

A. ( Z n(s) )

Step-by-step solution

The more negative the ( E^ ) value. The more readily the metal loses electrons. The more negative the value the stronger is the reducing agent. Therefore, strongest reducing agent is ( Zn )

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