1.

Which of the following represents the incoorect order of the properties indicated?A. `Ni^(2+)gtCr^(2+)gtFe^(2+)gtMn^(2+)` (size)B. `ScgttIgtCrgtMn` (size)C. `Ni^(2+)ltCo^(2+)ltFe^(2+)ltMn^(2+)` (unpaired electron)D. `H_3AsO_4gtH_3PO_4` (acidic strength order)

Answer» Correct Answer - a,d
(a). Same order for neutral atom and ion having same charge. (a) and (d) are incorrect.
`overset(ScgtTigtVgtCrgtMn)to`
Therefore `Cr^(2+)gtMn^(2+)gtFe^(2+)gtCo^(2+)gtNi^(2+)`
(d). `H_2AsO_4ltH_2PO_4` as P is more electronegative than As.


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