Based on the data given below : array ll E _ Cr ₂ O ₇²⁻ / 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 array the strongest reducing agent is :

Step-by-step solution

aligned & E _ Cr ₂ Of ₄^ / ca ^8 ^0=1.33 ~V _ C ₂ / Cr ^ =1.36 ~V & E _ MnO ₄ / Mm ^2 ^ =1.51 ~V E _ Cr ^2 / Cr ^0=-0.74 ~V aligned The species which has the most negative value of standard reduction potential will be the strongest reducing agent. Since Cr ³⁺ / Cr has SRP value of -0.74 ~V , Cr is the strongest reducing agent.