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| 1. |
State reasons for the following: (i) Cu(I) ion is not stable in an aqueous solution. (ii) Unlike Cr^(3+)Mn^(2+), Fe^(3+) and the subsequent other M2+ ions of the 3d series of elements, the 4d and the 5d series metals generally do not form stable cationic species. |
| Answer» SOLUTION :(ii) DUE to lanthanoid contraction the expected increase in SIZE does not OCCUR. | |