A. Water-alcohol
B. Methyl alcohol-acetone
C. Butyl acetate-water
D. None of these
Related Mcqs:
- 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 - At what percentage (by volume) of alcohol composition, it forms an azeotrope with water ?
A. 90
B. 91.5
C. 95
D. 99 - 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. - A minimum boiling azeotrope is exemplified by__________________________?
A. Toluene-benzene
B. Acetone-carbon disulphide
C. Water-isobutyl alcohol
D. None of these - Gaseous diffusivity at atmospheric pressure is of the order of _____________________ cm2/second?
A. 1
B. 1 to 5
C. 5 to 10
D. > 10 - Schmidt number and Lewis number for pure air at atmospheric conditions are respectively__________________?
A. < 1 and ≈ 1
B. 1 and 0
C. > 1 and ≈ 1
D. 0 and ≈ 1 - The binary diffusivity in gases at atmospheric conditions is about ___________________?
A. 10-9 cm/sec
B. 10-1 cm2/sec
C. 10-3 sec/cm
D. 10-4 cm2/sec2 - At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is ________________ percent.?
A. 100
B. 0
C. 50
D. Between 0 and 100 - An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively. The humidity of air sample expressed as kg of water vapour/kg of dry air is__________________?
A. 0.048
B. 0.079
C. 0.122
D. 0.152 - Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid) ?
A. p = P
B. p >>P
C. p < P
D. p << P
