A. 90
B. 91.5
C. 95
D. 99
Related Mcqs:
- Water-ethyl alcohol solution can be concentrated (in respect of alcohol concentration) by ________________ distillation?
A. Atmospheric
B. Vacuum
C. High pressure
D. None of these - The equilibrium liquid composition compared to the vapor composition in case of________________?
Azeotropic mixture is
A. More
B. Less
C. Same
D. Either more or less; depends on the system - One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult’s law is obeyed, then changing the feed composition would effect ?
A. The product composition but not the fraction vaporised
B. The product composition as well as the fraction vaporised
C. The fraction vaporised but not the product composition
D. Neither the product composition nor the fraction vaporised - Pick out the system with minimum boiling azeotrope at 1 atm ?
A. Benzene-toluene
B. Ethyl alcohol-water
C. Hydrochloric acid-water
D. All A., B. and C. - Which of the following binary systems is an example of a maximum boiling azeotrope ?
A. Water-hydrochloric acid
B. Acetone-carbon disulphide
C. Water-ethyl alcohol
D. n-heptane-n-octane - A minimum boiling azeotrope is exemplified by__________________________?
A. Toluene-benzene
B. Acetone-carbon disulphide
C. Water-isobutyl alcohol
D. None of these - Which of the following mixtures does not form an azeotrope at atmospheric pressure ?
A. Water-alcohol
B. Methyl alcohol-acetone
C. Butyl acetate-water
D. None of these - At equilibrium the concentration of water in vapour phase (C*) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is_________________?
A. 0.0
B. 0.2
C. 0.4
D. 1.0 - When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system ?
A. As the acetone concentration increases, the solubility curves approach each other
B. Both the phases become identical at a particular common point on both the solubility curves
called the plait point
C. The distribution curve which is a plot between x (acetone concentration in one phase) and y
(acetone concentration in other phase) is analogous to x-y curve used in distillation and
absorption terminates on the x = y diagonal at the concentration of the plait point
D. All A., B. and C. - Azeotropism for ethyl alcohol-water system disappears by_____________________?
A. Increasing temperature
B. Decreasing pressure
C. Increasing pressure
D. No means
