A. 28 litres
B. 35 ft3
C. 4.5 litres
D. 4.5 ft3
CHEMICAL ENGINEERING
In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is__________________?
A. Independent of the temperature
B. Increased with the increase in pressure
C. Decreased with the increase in pressure
D. Unchanged by the pressure change
The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation_________________?
A. Increases with pressure rise
B. Decreases with increasing pressure
C. Becomes zero at the critical point
D. Both B. & C.
_____________ fuels require the maximum percentage of ‘excess air’ for complete combustion ?
A. Solid
B. Liquid
C. Gaseous
D. Nuclear
Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution) ?
A. log (1/H+)
B. – log (1/H+)
C. 1/log H+
D. None of these
Heat of transition is the heat evolved or absorbed, when a substance is converted from_________________?
A. Vapor to liquid
B. Vapor to solid
C. Solid to liquid
D. One allotropic form to another allotropic form
The vapor pressure of water at 100°C is__________________?
A. 100 N/m2
B. 76 cms of Hg
C. 13.6 cms of Hg
D. 760 mm wc
The OH- concentration in a solution having pH value 3 is____________________?
A. 10-3
B. 10-10
C. 10-11
D. 10-13
Kinetic theory of gases stipulates that, the____________________?
A. Energy is lost during molecular collisions
B. Molecules possess appreciable volume
C. Absolute temperature is a measure of the kinetic energy of molecules
D. None of these
pH value of H2SO4 (5% concentration) is__________________?
A. 5
B. 7
C. > 7
D. < 7