The correct increasing order of reducing power of the metals is:
K+/K = –2.93 V |
Ag+/Ag = 0.80 V |
Hg2+/Hg = 0.79 V |
Mg2+/Mg = –2.37 V |
Cr3+/Cr = – 0.74 V |
1. | Cr < Mg < K < Ag < Hg | 2. | Mg < K < Ag < Hg < Cr |
3. | K < Ag < Hg < Cr < Mg | 4. | Ag < Hg < Cr < Mg < K |