Thermodynamics — Chemistry STD 11 Science — Question

$(a)\,B{r_2}(l) \to B{r_2}(g)$

$(b)\,{H_2}O(s) \to {H_2}O(g)$ 

$(c)\,{N_2}\,\left[ {1\,atm,\,{{100}\,^o}C} \right] \to {N_2}\,\left[ {1\,atm,\,{{150}\,^o}C} \right]$

$(d)\,{N_2}\,(g) + 3{H_2}(g) \to 2N{H_3}(g)$

$(e)\,CaC{O_3}(s) \to CaO(s) + C{O_2}(g)$

${N_2}{H_4}\left( l \right) + 2{H_2}{O_2}\left( l \right) \to \mathop {{N_2}\left( g \right) + 4{H_2}O\left( l \right);}\limits_{{\Delta_r} H_1^o =  - 818\,kJ/mol} $

${N_2}{H_4}\left( l \right) + {O_2}\left( g \right) \to \mathop {{N_2}\left( g \right) + 2{H_2}O\left( l \right);}\limits_{{\Delta _r}H_2^o =  - 622\,kJ/mol} $

${H_2}\left( g \right) + \frac{1}{2}{O_2}\left( g \right) \to \mathop {{H_2}O\left( l \right);}\limits_{{\Delta _r}H_3^o =  - 285\,kJ/mol} $

.......$kJ/mol$

Statement $I :$ Bohr's theory accounts for the stability and line spectrum of $Li ^{+}$ ion.

Statement $II :$ Bohr's theory was unable to explain the splitting of spectral lines in the presence of a magnetic field.

In the light of the above statements, choose the most appropriate answer from the options given below: