Circle around the letter of the correct answer

The most efficient mass transfer contactor in the distillation column is a$)$ bubble cap plates b$)$ fillers c$)$ sieve plates d$)$ valve plates

For a vapor phase, if $P_T=1$atm,$y_A=0\mathrm{.}1,$ then $P_A$ equals to

a$)0\mathrm{.}5$atm b$)0\mathrm{.}1$atm c$)10$atm d$)1$atm

Murphree efficiency measures the efficiency of the

a$)$ entire column b$)$ reboiler c$)$ single plate d$)$ rectifying section

The relation between $R_D$ and $x_D$ of the distillation tower is

a$)$ proportional b$)$ varied c$)$ inversely proportional

At normal operating condition, the distillation column is said to be at

a$)$ eddy state b$)$ equilibrium c$)$ fuzzy state d$)$ steady state

For a miscible binary mixture to be distilled, ${}_{AB}$ must not equal to

a$)5\mathrm{.}0$ b$)1\mathrm{.}0$ c$)0\mathrm{.}5$ d$)10\mathrm{.}0$

The relation between $R_{\text{o}\text{p}\text{t}}($optimum reflux ratio$)$ and $R_m($minimum reflux ratio$)$ is

a$)R_{\text{o}\text{p}\text{t}}=5R_m$

b$)R_{\text{o}\text{p}\text{t}}=2R_m$

c$)R_{\text{o}\text{p}\text{t}}=1\mathrm{.}5R_m$

d$)R_{\text{o}\text{p}\text{t}}=0\mathrm{.}5R_m$

For a maximum reflux ratio, the number of plates required is

a$)$ minimum b$)$ optimum c$)$ maximum

The relative volatility $({}_{AB})$ in an upper stage, in comparison to a lower stage, is

a$)$ lower

b$)$ higher

c$)$ varied

As the two components to be distilled have a wide range of boiling poits the number of plates needed is

a$)$ large b$)$ varied c$)$ few

The refractive index $($RI$)$ of pure water is

a$)1\mathrm{.}511$ b$)1\mathrm{.}635$ c$)2\mathrm{.}561$ d$)1\mathrm{.}333$

The normal boiling point of ethanol is

a$)108C$ b$)78C$ c$)50C$ d$)155C$

At the optimum reflux ratio, the total cost of the distillation column ${?}^{is}$

a$)$ minimum

b$)$ optimum

c$)$ maximum