MCQ
Dative bond is present in
- A$O_3$
- B$NH_3$
- ✓$BaCl_2$
- D$BI_3$
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the rate of reaction is given by the expression :


Given $\left( E _{ Cu ^{2+} / Cu ^{+}}^{0}=0.16 V \right.$ $E _{ Cu ^{+} / Cu }^{0}=0.52 V$$\left.\frac{ RT }{ F }=0.025\right)$
$Cr_2O_7^{2-}$ ( $aq$ $1\,M$ ) $+ 14H^+(aq) + 6e^-$ $\rightarrow 2Cr^{+3} (aq,\,1\,M) + 7H_2O (l)$
$(i)$ $C{H_3} - C \equiv C - C{H_3}$
$(ii)$ $C{H_3} - C{H_2} - C{H_2} - C{H_3}$
$(iii)$ $C{H_3} - C{H_2} - C \equiv CH$
$(iv)$ $C{H_3} - CH = C{H_2}$