Mass Transfer The diffusivity (D) in a binary gas mixture is related to the pressure (P) as D ∝ 1/P0.5 D ∝ P0.5 D ∝ 1/P D ∝ 1/P1.5 D ∝ 1/P0.5 D ∝ P0.5 D ∝ 1/P D ∝ 1/P1.5 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in __________ tower. Perforated tray Bubble cap Wetted wall Packed Perforated tray Bubble cap Wetted wall Packed ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer For a binary mixture with low relative volatility, Use steam distillation An azeotrope may be formed during distillation Use high pressure distillation Use molecular distillation Use steam distillation An azeotrope may be formed during distillation Use high pressure distillation Use molecular distillation ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In batch distillation with constant reflux, overhead product composition __________ with time. May increase on decrease, depends on the system Decreases Does not vary Increases May increase on decrease, depends on the system Decreases Does not vary Increases ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Use of raschig rings in place of crushed stones as packing in packed beds (other things being same) Decreases pressure drop, decreases surface area Increases pressure drop, decreases surface area Decreases pressure drop, increases surface area Increases pressure drop, increases surface area Decreases pressure drop, decreases surface area Increases pressure drop, decreases surface area Decreases pressure drop, increases surface area Increases pressure drop, increases surface area ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing. Smaller than Either A, or B ; depends on the type of packing Greater than Equal to Smaller than Either A, or B ; depends on the type of packing Greater than Equal to ANSWER DOWNLOAD EXAMIANS APP
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