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$(A)$ Ethane-$1\ 2$-diamine is a chelating ligand.
$(B)$ Metallic aluminium is produced by elecrtrolysis of aluminium oxide in presence of cryolite.
$(C)$ Cyanide ion is used as ligand for leaching of silver.
$(D)$ Phosphine act as a ligand in Wilkinson catalyst.
$(E)$ The stability constants of $\mathrm{Ca}^{2+}$ and $\mathrm{Mg}^{2+}$ are similar with $EDTA$ complexes.
Choose the correct answer from the options given below:
${N_2}(g)\, + 3{H_2}(g)\, \rightleftharpoons \,2N{H_3}(g)$
The equilibrium constant of the above reaction is $K_3$. If pure ammonia is left to dissociate, the partial pressure of ammonia at equilibrium is given by (Assume that $P_{NH_3}<\,< P_{total}$ at equilibrium)