B.Sc. First year
Undergraduate degree course Semester second Physical chemistry paper IV
Syllabus: Postulates
of kinetic theory of gases, kinetic gas equation, Deduction of Gas Laws:
Boyles Law, Charles Law, Grahams Law of diffusion, Avogadro’s hypothesis, deviation
from ideal behavior, van der Waals equation of state. Critical Phenomena:
PV isotherms of real gases.
Multiple Choice questions:
1.
according to Boyle’s law the volume of a fixed mass of a gas, at constant
temperature, is
(a) directly
proportional to its pressure
(b) inversely
proportional to its pressure
(c) the
square root of its pressure
(d) none
of these
2.
Mathematically, Boyle’s law can be represented as
(a) V
∝ 1/P
(b) V
=
k/P
(c) V
P =
k
(d) all
of these
3. “Equal volumes of gases at the same
temperature & pressure contain equal number of molecules." This is
statement of
(a) Avogadro's
hypothesis
(b) Boyle's
Law
(c) Grahams
Law
(d) Charle's
Law
4. Which of the following is the correct
mathematical relation for Charle’s law at constant pressure?
(a) V
∝T
(b) V
∝t
(c) V
=
kt
(d) none
of these
5. Which of the following statement
is correct according to the kinetic theory of gases?
(a) Molecules are in rapid motion in one
direction
(b) Gas molecules are in rapid motion in
two directions
(c) Gas molecules are in rapid motion in
all directions
(d) None of these
6.
The average kinetic energy of the gas molecules is
(a) inversely
proportional to its absolute temperature
(b) directly
proportional to its absolute temperature
(c) equal
to the square of its absolute temperature
(d) directly
proportional to the square root of its absolute temperature
7. Which of the following statement
is correct from the kinetic theory of gases?
(a) the gas molecules are in rapid
motion in all possible directions
(b) molecular collisions are elastic
(c) pressure exerted by gas is due to
bombardment of the molecules
(d) all of these
8.
Which of the following gases will have the highest rate of diffusion?
(a) CH4
(b) NH3
(c) N2
(d) CO2
9. The ideal gas equation for gases
is ------------
(a) PV = nRC
(b) PV = nMC
(c) PV = nRTk
(d) PV = nRT
10.
The collision frequency of a gas is
(a) directly
proportional to the square root of absolute temperature
(b) directly
proportional to the absolute temperature
(c) inversely
proportional to the pressure of the gas
(d) inversely
proportional to the absolute temperature
11. According to the kinetic theory
of gases, the energy per mole of a gas is equal to ----(a) 1.5 RT
(b) RT
(c) 0.5 RT
(d) 2.5 RT
12.
Out of the following pairs of gases, which will diffuse through a porous plug
with the same rate of diffusion?
(a) NO,
CO
(b) CH4,
O2
(c) NO2,
CO2
(d) NO,
C2H6
13. PV = constant, at constant
temperature. This is according to ---------
(a) Charle's law
(b) Boyle's law
(c) Avogadro's law
(d) Graham's law
14."At a constant temperature,
the volume of a fixed mass of gas is invers proportional to its pressure."
'This is called ---
(a) Charle's law
(b) Graham's law
(c) Dalton's law
(d) Boyle's law
15.
The units of ‘a’ the van der Waal’s constant is
(a) atm.
Lit. mol–1
(b) atm.
lit–1 .mol–1
(c) atm.
lit–2 .mol–2
(d) atm.
lit–1. mol–2
16.At a constant pressure, the
volume of a fixed mass of gas is directly proportional to absolute
temperature." It is the statement of ----------
(a) Boyle's Law
(b) Graham's Law
(c) Dalton's Law
(d) Charle's Law
17.
Which of the following gases will have the lowest rate of diffusion?
(a) H2
(b) N2
(c) F2
(d) O2
18. The value of Avogadro's number
is -----
(a) 6.023x10-23
(b) 6.023x1023
(c) 6.023x10-27
(d) 6.023x1027
19. The ideal gas equation can be
obtained by combination of
(a) Boyle's and Charle's laws
(b) Boyle's and Avogadro's law
(c) Boyle's law, Charle's law and
Avogadro's law
(d) None of these
20.“The rate of diffusion of a gas
is inversely proportional to the square root of density of the gas at constant
pressure.” This is the -------
(a) Boyle's Law
(b) Charle's Law
(c) Dalton's Law
(d) Graham's Law
21. At a constant temperature, PV=k,
according to -----------
(a) Boyle's law
(b) Dalton's law
(c) Charles's law
(d) Graham's law
22. Kinetic energy of a gas is
directly proportional to the ----
(a) Mean square velocity
(b) mean velocity
(c) velocity
(d) square of velocity
23. The average distance travelled
by a molecule between two successive collisions is called-
(a) average free path
(b) partial free path
(c) mean free path
(d) None of these
24. Which of the following molecules
obey the postulates of kinetic theory?
(a) monoatomic molecules
(b) diatomic molecules
(c) both (a) and (b)
(d) none of these
25. Deviation of gases from ideal behavior
arise at_________
(a) high pressure and high temperature
(b) low pressure and low temperature
(c) high pressure and low temperature
(d) low pressure and high temperature
26. The pressure of real gases is --------- the pressure of ideal gases
(a) equal to
(b) less than
(c) none of these
(d) greater than
27. Which conditions are required
for the ideal gas behavior?
(a) Molecules in gaseous state should
not attract or respell
(b) Volume of the gas should be negligible
(c) Both (a) and (b)
(d) None of these
28. “The product of pressure and
volume of a given mass of gas is constant at constant temperature.” This law is
------------law.
(a) Boyle's
(b) Charles's
(c) Avogadro's
(d) Dalton's
29. Real gases behave ideally at
-----------
(a) Low temperature and high pressure
(b) Low temperature and low pressure
(c) High temperature and high pressure
(d) High temperature and low pressure
30. According to the kinetic theory,
the collisions between gas molecules are ---------
(a) elastic
(b) inelastic
(c) plastic
(d) all of these
31. The Van der Waals constant 'b'
is almost equal to the ----------of the liquid.
(a) molar pressure
(b) molar volume
(c) molar temperature
(d) partial vapor pressure
32. Van-der Waals constant 'a'
increases with ------------
(a) decreasing boiling point
(b) increasing boiling point
(c) at constant boiling point
(d) all of these
33. Large deviation from ideal gas
behavior is due to ---------
(a) strong attractive forces between
molecules
(b) weak intermolecular attraction
between molecules
(c) both (a) and (b)
(d) none of these
34.Van der Waals constant 'a' is
small if force of attraction between gases molecules is ------
(a) strong
(b) weak
(c) constant
(d) 0
35. The pressure of real gases is
--------- the pressure of ideal gases
(a) equal to
(b) less than
(c) none of these
(d) greater than
36. Energy of an ideal gas is -----
(a) completely kinetic
(b) completely potential
(c) completely translational
(d) K.E + P.E.
37. Which is not true for an ideal
gas?
(a) it can be converted into liquid
(b) there is no attraction between the
molecules
(c) PV is proportional to the amount of
gas
(d) all the molecules of gas move with
same speed
38. According to the kinetic theory
of gases kinetic energy depends on -------------
(a) atomic number
(b) pressure
(c) temperature
(d) collisions
39. Kinetic theory of gases was proposed
by ------------------
(a) Boyle’s
(b) Joule
(c) Bernoulli
(d) Van der Waals
40. The temperature at which a gas
behaves like an ideal gas is called as--------------,
(a) inversion temperature
(b) critical pressure
(c) Boyle's temperature
(d) Joule's temperature
41. The minimum pressure required to
liquefy a gas at its critical temperature is called
(a) critical temperature
(b) Boyle's pressure
(c) critical pressure
(d) Charles's pressure
42. For one mole of an ideal gas, at
a given temperature, Z called------
(a) volume factor
(b) pressure factor
(c) compressibility factor
(d) none
43. Compressibility factor is unity
for ----------
(a) Ideal gas.
(b) real gas
(c) both (a) and (b)
(d) none
44. The arithmetic mean of different
velocities possessed by the molecules of gas at a given temperature is called
-----
(a) Average velocity
(b) Most probable velocity
(c) RMS velocity
(d) all of these
Click here for pdf file
1) Mathematical concepts MCQ
2) Gaseous State MCQ
3)Liquid State MCQ
4) Solid State MCQ
5)Chemical kinetics MCQ
6) Catalysis MCQ
7) Colloidal State MCQ
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