Question

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

`"E"_("Cr"_2"O"_7^(2-)//"Cr"^(3+))^⊖` = 1.33 V  `"E"_("Cl"_2//"Cl"^-) = 1.36` V

`"E"_("MnO"_4^-//"Mn"^(2+))` = 1.51 V  `"E"_("Cr"^(3+)//"Cr")` = - 0.74 V

Options

• Cl^– 

• Cr

• Cr³⁺ 

• Mn²⁺ 

Answer 1

Cr

Explanation:

A negative value of standard reduction potential for Cr³⁺ to Cr means that the redox couple is a stronger reducing agent.