Answer :

Correct answer is : 195.19

$\mathrm{L}\mathrm{i}\mathrm{q}\mathrm{u}\mathrm{i}\mathrm{d}\mathrm{v}\mathrm{a}\mathrm{p}\mathrm{o}\mathrm{u}\mathrm{r},\ln P=24.38-\frac{3063}{T}$

$\mathrm{S}\mathrm{o}\mathrm{l}\mathrm{i}\mathrm{d}\mathrm{v}\mathrm{a}\mathrm{p}\mathrm{o}\mathrm{u}\mathrm{r},\ln P=27.92-\frac{3754}{T}$

At triple point temperature of solid, liquid and vapour is same

∴ Equating

$24.38-\frac{3063}{T}=27.92-\frac{3754}{T}$

Now,

Multiplying by ‘T’ on both sides

24.38 T – 3063 = 27.92 T – 3754

3.54 T = 691

T = 195.197 K