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⁺

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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