Mass Transfer-I Set 4

+ve

✘

-ve

✘ zero ✘ none of these ✔

relative volatility is reasonably constant. ✘ mixture (to be separated) shows negative deviation from ideality. ✘ mixture (to be separated) shows positive deviation from ideality. ✘ multicomponent distillation is involved. ✔

cold water leaving the tower and the wet bulb temperature of the surrounding air. ✘ hot water entering the tower and the wet bulb temperature of the surrounding air. ✘ hot water entering the tower and the cooled water leaving the tower. ✘ none of these ✔

Mixer-settler extractor ✘ Centrifugal extractor ✘ Pulsed extractor ✘ Packed extraction tower ✔

chemical properties ✘ physical properties ✘ degree of turbulence ✘ interfacial area ✔

0.5 ✘ 0.6 ✘ 2 ✘ 1 ✔

maximum number of ideal plates. ✘ height of the distillation column. ✘ minimum number of theoretical plates. ✘ optimum reflux ratio. ✔

increases ✘ decreases ✘ remains same ✘ either (a) or (b), depends on the system ✔