1281. Which liquid has highest Vapor pressure :
A. HF
B. H2O *
C. Acetic acid
D. Glycerin
1282. Vapor pressure of a liquid does not depends upon :
A. Nature of liquid
B. IMF
C. Temperature
D. Surface area *
1283. Vapour pressure of water at 25 degree centigrade is:
A. 76 Torr
B. 24 Torr *
C. 50 Torr
D. 80 Torr
1284. Which of the following has highest boiling point ?
A. Dimethyl ether
B. Acetic acid *
C. Water
D. Ethyl alcohol
1285. Freezing of water is :
A. Endothermic process
B. Exothermic process *
C. Spontaneous process
D. Both B and C
1286. Unit of surface tension is :
A. J.M -1
B. N.M -1 *
C. ERG.CM -1
D. All
1287. Which of the following property of liquid is concerned with its internal resistance to follow :
A. Surface tension
B. Viscosity *
C. Refractive index
D. Optical activity
1288. Capillary action can be explained by :
A. Surface tension *
B. Resistance to flow
C. Heat of vaporization
D. All
1289. Drop of a liquid acquire Spherical shape because :
A. Its tendency to minimize its surface area *
B. Its viscous nature
C. Its cohesive forces
D. None of those
1290. Poise is the unit of :
A. Surface tension
B. Viscosity *
C. Vapor pressure
D. Capillary action