Ncert Exercises & Solutions

Using the data given below find out the strongest reducing agent.

$\begin{array}{l} E_{{Cr}_{2} O_{7}^{2 -} / {Cr}^{3 +}}^{⊝} = 1.33 V; E_{{Cl}_{2} / {Cl}^{-}}^{⊖} = 1.36 V \\ E_{Mn 0_{4}^{-} / {Mn}^{2 +}}^{⊝} = 1.51 V; E_{{Cr}^{3 +} / Cr}^{⊖} = - 0.74 V \end{array}$

1. Cl^-

2. Cr

3. Cr³⁺

4. Mn²⁺

Hint: The higher the value of the reduction potential, the weaker is the reducing agent.

Here, out of given four options standard reduction potential of chromium has highest negative value hence most powerful reducing agent is chromium.

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