- Avariable oxidation states
- Btendency to form complexes
- Cformation of coloured compounds
- ✓none of these
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$[CH_3CH(CH_3)]_2 \,C(CH_2CH_3)C(CH_3) C(CH_2CH_3)_2$

${E^o}_{\left( {{I_2}/{I^ - }} \right)},{E^ \circ }_{\left( {Br^-/B{r_2}} \right)}$ and ${E^ o }_{\left( {{Fe}/{Fe^{2+} }} \right)}$
are respectively $+ 0.54\ V$, $-1.09\ V$ and $0.44\ V$. On the basis of above data which of the following process is non-spontaneous
$(A)$ $B$ $(B)$ $B _2 H _6$ $(C)$ $B _2 O _3$ $(D)$ $HBF _4$
$\mathop {Salt\,\,'A'}\limits_{(Colourless)} \,\,\xrightarrow{{Cu}}$ Blue solution
$\mathop {Salt\,\,'A'}\limits_{(Colourless)} \,\,\xrightarrow[{(aq)}]{{HCl}}$ White ppt
$\mathop {Salt\,\,'A'}\limits_{(Colourless)} \,\,\xrightarrow[{{H_2}S{O_4}}]{{Conc.}}$ Brown fumes