Page 1 - KTG WS-1-#141513130122

Worksheet -1 (KTG)

1 In which condition can real gas obey closely the ideal gas equation?
a. pressure is very small and temperature is very high
b. pressure is very high and temperature is very low
c. both pressure and temperature are very high
d. both pressure and temperature are very low
2 What is an ideal gas?
a. which obeys the law pv = RT
b. which obeys the law p = vR / T
c. which obeys the law pv = R / T
d. none of the above
3 The perfect example of an ideal gas is
a. air
b. hydrogen
c. water vapour
d. none of the above
4 Suppose a container is evacuated to have just one molecule of a gas in it. Let V a &
V rms represent the Average Speed and rms speed of the molecule
a. V a > V rms
b. V a < V rms
c. V a = V rms
d. V rms is undefined
5 find the ratio of mean speed of Oxygen, chlorine, Hydrogen
1/2
a. 4:1 : (.45)
1/2
b. 5:2 :(5)
1/2
c. 1: (.45) :4
1/2
1/2
d. 2 :(.45) : (1.5)
6 There are two statement about Ideal gases
Statement A The V rms of gas molecules depends on the mass of the gas molecule and
the temperature
Statement B The V rms is same for all the gases at the same temperature
which one of the following is correct
a. A and B both
b. A only
c. B only
d. A and B both are incorrect
7 The velocities of the molecules are v, 2v, 3v, 4v & 5v. The rms speed will be
a. 11v
1/2
b. v(11)
c. v
d. 3.3v
8 Under conditions of fixed temperature and amount of gas, Boyle's law requires
that
I. P 1V 1 = P 2V 2
II. PV = constant
III. P 1/P 2 = V 2/V 1
(a) I only