8.2 Organic chemistry isomerism — Chemistry STD 11 Science — Question

${N_2} + {O_2}$ $\rightleftharpoons$ $2NO - 43,200\,kcal$

$C{H_4}(g) + 2{O_2}(g) \to C{O_2}(g) + 2{H_2}O(l)$ ;

${\Delta _r}{H_{300}} =  - 212.7\ Kcal / mol$ .

The absolute value of ${\Delta _r}U_{300}^o$ for this reaction is .......$Kcal\,/\,mol$ $(R = 2\ cal/mol-K)$

$A$. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point.

$B$. Aniline can be purified by steam distillation as aniline is miscible in water.

$C$. Ethanol can be separated from ethanol water mixture by azeotropic distillation because it forms azeotrope.

$D$. An organic compound is pure, if mixed $M.P$. is remained same.

Choose the most appropriate answer from the options given below :