$(1) \,C_2H_{6(g)} $ $\rightleftharpoons$ $ C_2H_{4(g)} + H_{2(g)}$
$(2)\, N_{2(g)} + O_{2(g)} $ $\rightleftharpoons$ $ 2NO_{(g)}$
$(3) \,H_{2(g)} + I_{2(g)} $ $\rightleftharpoons$ $ 2HI_{(g)}$
$\mathrm{K}_{\mathrm{c}}=4.9 \times 10^{-2}$. છે. $2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_3(\mathrm{~g})$ પ્રક્રિયા માટે $\mathrm{K}_{\mathrm{c}}$ માટે નું મુલ્ય શોધો.
$Fe^{3+} + SCN^{- }$ $\rightleftharpoons$ $ FeSCN^{2+}$