MCQ
An ionizing solvent has
- ALow value of dielectric constant
- ✓High value of dielectric constant
- CA dielectric constant equal to $ = 1$
- DHas a high melting point
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$A$. 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 :
${\text{2PQ}} \rightleftharpoons {{\text{P}}_2}{\text{ + }}{{\text{Q}}_2}\,;\,\,\,\,{{\text{K}}_1}{\text{ = 2}}{\text{.5 }} \times \,{\text{1}}{{\text{0}}^5}\,$
${\text{PQ + }}\frac{1}{2}{R_2} \rightleftharpoons PQR\,;\,\,\,\,{{\text{K}}_2}{\text{ = 5 }} \times \,{\text{1}}{{\text{0}}^{ - 3}}\,$
The value of equilibrium constant for reaction
$\frac{1}{2}{{\text{P}}_2}{\text{ + }}\frac{1}{2}{{\text{Q}}_2}{\text{ + }}\frac{1}{2}{R_2} \rightleftharpoons PQR\,$ is