$51.$ Raoults Law is applicable under which condition for a solution?

$-$ A$)$ Ideal solutions only

$-$ B$)$ Non$-$ideal solutions only

$-$ C$)$ Both ideal and non$-$ideal solutions

$-$ D$)$ Solutions at critical temperature

$52.$ The principle of steam distillation relies on:

$-$ A$)$ Decreasing the overall vapor pressure of the mixture

$-$ B$)$ Increasing the molecular weight of the mixture

$-$ C$)$ Lowering the boiling points of the components due to the presence of steam

$-$ D$)$ Increasing the solution's total volume

$53.$ In the context of distillation, the term "relative volatility" specifically refers to:

$-$ A$)$ The volatility of the most volatile component relative to the least volatile component

$-$ B$)$ The ratio of the mole fraction of components in the liquid phase to the vapor phase

$-$ C$)$ The ratio of vapor pressures of components in a mixture

$-$ D$)$ The change in volatility of components with temperature

$54.$ The McCabeThiele method is best used for:

$-$ A$)$ Non$-$ideal mixtures with variable relative volatility

$-$ B$)$ Ideal mixtures with constant relative volatility

$-$ C$)$ Multi$-$component mixtures

$-$ D$)$ Solids distillation