MCQ
Transitional elements are named transition elements because their characters are
- ✓In between $ s$ and $ p -$ block elements
- BLike that of $p $ and $d -$ block elements
- CThey are members of $I -A$ group
- DThey are like inactive elements
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$F{e^{3 + }}(aq) + {e^ - } \to F{e^{ - 1}}(aq);\,{E^o} = + 0.77\,V$
$A{l^{3 + }}(aq) + 3{e^ - } \to Al(s);\,{E^o} = - 1.66\,V$
$B{r_2}(aq) + 2{e^ - } \to 2B{r^ - }(aq);\,{E^o} = + 1.08\,V$
Based on the data given above, reducing power of $F{e^{2 + }},\,Al$ and $B{r^ - }$ will increase in the order
$(A)$ Addition of an electron in $O_2$ decreases bond order
$(B)$ Addition of an electron in $O_2$ increases bond order
$(C)$ Removal of an electron from $O_2$ increases bond length
$(D)$ Removal of an electron from $O_2$ decreases bond length
(Atomic mass, $Ag =108, Br =80\, g\, mol ^{-1}$ )