Which of the following is strongest reducing agent and why. Zn,. H2, Cr, Fe,

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Solution

Among them Zn is the strongest reducing agent because in most of the reactions above that go forward, it gets oxidized (loses electrons.)

you can remember that alkaline earth and alkaline metals both give up their electrons easily (have low electron affinity) and can be considered to have good reducing strength..

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Similar questions

25^{\circ} C

Z n^{2 +} (a q .) + 2 e^{-} ⇌ Z n (s); - 0.762

C r^{3 +} (a q .) + 3 e^{-} ⇌ C r (s); - 0.740

2 H^{+} + 2 e^{-} ⇌ H_{2} (g); 0.00

F e^{3 +} + e^{-} ⇌ F e^{2 +}; 0.77

Which is a stronger reducing agent Cr²⁺ or Fe²⁺ and why?

F e^{2 +}

C r^{2 +}

Z n^{2 +} (a q .) + 2 e ⇌ Z n (s); - 0.762

C r^{3 +} (a q) + 3 e ⇌ C r (s); - 0.740

2 H^{+} (a q) + 2 e ⇌ H_{2} (g); 0.00

F e^{3 +} (a q) + e ⇌ F e^{2 +} (a q); 0.770

Z n^{2 +} (a q) + 2 e ⇌ Z n (s) - 0.762

C r^{3 +} (a q) + 2 e ⇌ C r (s) - 0.740

2 H^{+} (a q) + 2 e ⇌ H_{2} (g) 0.000

F e^{3 +} (a q) + 2 e ⇌ F e^{2 +} (a q) 0.770

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