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

Question

The standard reduction potential at 298 K for the following half cell reaction Z n 2 + ( a q ) + 2 e − → Z n ( s ) ; E ∘ = − 0.762 V C r 3 + ( a q ) + 3 e − → C r ( s ) ; E ∘ = 0.740 V 2 H + ( a q ) + 2 e − → H 2 ​ ( g ) ; E ∘ = 0.0 V F 2 ​ ( g ) + 2 e − → 2 F − ( a q ) ; E ∘ = 2.87 V Which of the following is strongest reducing agent ?, $ Z n(s) $, $ C r(s) $, $ H_{2}(g) $, $ F_{2}(g) $

MARKS App · Accepted Answer

The more negative the $ E^{\circ} $ value. The more readily the metal loses electrons. The more negative the value the stronger is the reducing agent. Therefore, strongest reducing agent is $ \mathrm{Zn} $

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