The chemical nature of an element is independent of:
A. Its atomic number
B. The number of protons or electrons present in it
C. The number of neutrons present in it
D. None of these
In general, the specific heats of aqueous solutions ____ with increase in the concentration of the solute:
A. Increase
B. Decrease
C. Remain unchanged
D. None of these
S.T.P. corresponds to:
A. 1 atm. absolute pressure & 15.5°C
B. 760 mm Hg gauge pressure & 15.5°C
C. 760 torr & 0°C
D. 101.325 kPa gauge pressure & 15.5°C
If pH value of a solution is 8, then its pOH value will be:
A. 6
B. 1
C. 7
D. 10
Average molecular weight of air is about:
A. 21
B. 29
C. 23
D. 79
With increase in temperature, the surface tension of water:
A. Increases
B. Decreases
C. Remain constant
D. Increases linearly
Vapor pressure of water at 100°C is about _____ bar:
A. 0.1013
B. 1.013
C. 10.13
D. 101.3
Atomic _____ of an element is a whole number:
A. Weight
B. Number
C. Volume
D. Radius
The latent heat of vaporisation:
A. Decreases with increased temperature
B. Decreases as pressure increases
C. Becomes zero at the critical point
D. All A., B. & C.
Atoms of the same element, but of different masses are called:
A. Isobars
B. Isotones
C. Isotopes
D. None of these
