`S_(1) : Mn^(2+)` compounds more stable than `Fe^(2+)` towards oxidation to their `+3` state. `S_(2)` : Titanium and copper both in the first series of transition metals exhibits `+1` oxidation state most frequently. `S_(3) : Cu^(+)` ions is stable in aqueous solutions. `S_(4)` : The `E^(0)` value for the `Mn^(3+)//Mn^(2+)` couple much more positive than that for `Cr^(3+)//Cr^(2+)` or `Fe^(3+)//Fe^(2+)`,A. TTFTB. TFFTC. TFTTD. FFTF

`S_(1) : Mn^(2+)` compounds more stable than `Fe^(2+)` towards oxidati

1.	`S_(1) : Mn^(2+)` compounds more stable than `Fe^(2+)` towards oxidation to their `+3` state. `S_(2)` : Titanium and copper both in the first series of transition metals exhibits `+1` oxidation state most frequently. `S_(3) : Cu^(+)` ions is stable in aqueous solutions. `S_(4)` : The `E^(0)` value for the `Mn^(3+)//Mn^(2+)` couple much more positive than that for `Cr^(3+)//Cr^(2+)` or `Fe^(3+)//Fe^(2+)`,A. TTFTB. TFFTC. TFTTD. FFTF
Answer» Correct Answer - B `S_(1):` It is because `Mn^(2+)` has `3d^(5)` configuration which has extra stability. `S_(2):` Not titatnium but copper, because with +1 oxidation state an extra stable configuraiton `3d^(10)` results `S_(3):`It is not stable as it undergoes disproportionation `2Cu^(+)(aq)toCu^(2+)(aq)+Cu(s).` The `E^(underline(o))` value for this is favourable. `S_(4)`: Much larger third ionisation energy of Mn (where the required change is `d^(5)` to `d^(4)`) is mainly responsible for this.

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