$12^{M g}-1 s^2 2 s^2 2 p^6 3 s^2$
$20{ }^M-1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 4 s^2$
All three have pair of $'s'$ electron in outermost shell and all are Alkaline Earth metals.
They does not have pair of 'Pelectron in outermost shell because all are $'s'$-black elements.
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$\mathrm{FeO}_{(0)}+\mathrm{C}_{\text {(gaplike) }} \longrightarrow \mathrm{Fe}_{(0)}+\mathrm{CO}_{(\mathrm{g})}$
| Substance |
$\Delta \mathrm{H}^{\circ}$ $\left(\mathrm{kJ} \mathrm{mol}^{-1}\right)$ |
$\Delta \mathrm{S}^{\circ}$ $\left(\mathrm{J} \mathrm{mol}^{-1} \mathrm{~K}^{-1}\right)$ |
| $\mathrm{FeO}_{(s)}$ | $-266.3$ | $57.49$ |
| $\mathrm{C}_{\text {(graphite) }}$ | $0$ | $5.74$ |
| $\mathrm{Fe}_{(s)}$ | $0$ | $27.28$ |
| $\mathrm{CO}_{(\mathrm{g})}$ | $-110.5$ | $197.6$ |
The minimum temperature in $\mathrm{K}$ at which the reaction becomes spontaneous is ....... .
(Integer answer)
$\mathrm{A}+\mathrm{B} \rightleftharpoons 2 \mathrm{C}$
the value of equilibrium constant is $100$ at $298\, \mathrm{~K}$. If the initial concentration of all the three species is $1\, \mathrm{M}$ each, then the equilibrium concentration of $\mathrm{C}$ is $\mathrm{X} \times 10^{-1} \,\mathrm{M}$. The value of $\mathrm{x}$ is $.....$ (Nearest integer)
