MCQ
Ethylene diaminetetraacetate $(EDTA)$ ion is :
- ✓Hexadentate ligand with four $"O"$ and two $"N"$ donor atoms
- BUnidentate ligand
- CBidentate ligand with two $"N''$ donor atoms
- DTridentate ligand with three $"N"$ donor atoms

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$[Figure]$ $\xrightarrow{{{H^ + }/H{g^{2 + }}}}A$
the product '$ A'$ is
$Fe^{3+} + e \to Fe^{2+} ;$ $E^o = 0.771\, volts$
$I_2 + 2e\to 2I^-;$ $E^o = 0.536\, volts$
$E^o$ cell for the cell reaction
$2Fe^{3+} + 2I^-\to 2Fe^{2+} + I_2$ is
$2H_2 + 2NO \to N_2 + 2H_2O$
the following mechanism has been proposed
$(i)$ $2NO \rightleftharpoons N_2O_2\,$ (fast)
$(ii)$ $N_2O_2 + H_2 \xrightarrow{{{k_2}}} N_2O + H_2O\,$ (slow)
$(iii)$ $N_2O + H_2 \to N_2 + H_2O\,$ (fast)
then what will be the rate law of this reaction ?