The vapour density of ${\mathrm{N}}_2{\mathrm{O}}_4$ at a certain temperature is $30$. What is the $\%$ dissociation of ${\mathrm{N}}_2{\mathrm{O}}_4$ at this temperature?

Densities of diamond and graphite are $3.5$ and $2.3 \mathrm{g}/\mathrm{mL}$.

$\mathrm{C} \left(\mathrm{diamond}\right) \rightleftharpoons \mathrm{C} \left(\mathrm{graphite}\right)$    ${\mathrm{\Delta }}_{\mathrm{r}}\mathrm{H}=-1.9 \mathrm{kJ} {\mathrm{mole}}^{-1}$ favourable conditions for formation of diamond are;

What is ${\mathrm{\Delta }}_{\mathrm{r}}\mathrm{G}(\mathrm{kJ}/\mathrm{mole})$ for synthesis of ammonia at $298 \mathrm{K}$ at following sets of partial pressure:

${\mathrm{N}}_2\left(\mathrm{g}\right)+3{\mathrm{H}}_2\left(\mathrm{g}\right)\rightleftharpoons 2{\mathrm{NH}}_3\left(\mathrm{g}\right); {\mathrm{\Delta }}_{\mathrm{r}}\mathrm{G}°=-33 \mathrm{kJ}/\mathrm{mole}.$ [Take $\mathrm{R}=8.3 \mathrm{J}/\mathrm{K} \mathrm{mole},\left.\log 2=0.3; \log 3=0.48\right]$

${\mathrm{N}}_2+{\mathrm{O}}_2\rightleftharpoons 2\mathrm{NO}, {\mathrm{K}}_1;\left(\frac{1}{2}\right){\mathrm{N}}_2+\left(\frac{1}{2}\right){\mathrm{O}}_2\rightleftharpoons \mathrm{NO}, {\mathrm{K}}_2$

$2\mathrm{NO}\rightleftharpoons {\mathrm{N}}_2+{\mathrm{O}}_2,{ \mathrm{K}}_3; \mathrm{NO}\rightleftharpoons \left(\frac{1}{2}\right){\mathrm{N}}_2+\left(\frac{1}{2}\right){\mathrm{O}}_2,{ \mathrm{K}}_4$

Correct relation between ${\mathrm{K}}_1,{ \mathrm{K}}_2,{ \mathrm{K}}_3$ and ${\mathrm{K}}_4$ is :