8
MCQ (Single Correct Answer)
Gases possess characteristic critical temperature which depends upon the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases.
| Gases | H$$_2$$ | He | O$$_2$$ | N$$_2$$ |
|---|---|---|---|---|
| Critical temperature in Kelvin | 33.2 | 5.3 | 154.3 | 126 |
From the above data what would be the order of liquefaction of these gases? Start writing the order from the gas liquefying first
A
$\mathrm{H}_2, \mathrm{He}, \mathrm{O}_2, \mathrm{~N}_2$
B
$\mathrm{He}, \mathrm{O}_2, \mathrm{H}_2, \mathrm{~N}_2$
C
$\mathrm{N}_2, \mathrm{O}_2, \mathrm{He}, \mathrm{H}_2$
D
$\mathrm{O}_2, \mathrm{~N}_2, \mathrm{H}_2, \mathrm{He}$
9
MCQ (Single Correct Answer)
What is SI unit of viscosity coefficient $(\eta)$ ?
A
Pascal
B
$\mathrm{Nsm}^{-2}$
C
$\mathrm{km}^{-2} \mathrm{~s}$
D
$\mathrm{Nm}^{-2}$
10
MCQ (Single Correct Answer)
Atmospheric pressures recorded in different cities are as follows
| Cities | Shimla | Bangalore | Delhi | Mumbai |
|---|---|---|---|---|
| p in N/m$$^2$$ | $$1.01\times10^5$$ | $$1.2\times10^5$$ | $$1.02\times10^5$$ | $$1.21\times10^5$$ |
Consider the above data and mark the place at which liquid will boil first.
A
Shimla
B
Bangalore
C
Delhi
D
Mumbai
11
MCQ (Single Correct Answer)
Which curve in figure represents the curve of ideal gas?
A
Only B
B
C and D
C
E and F
D
A and B
12
MCQ (Single Correct Answer)
Increase in kinetic energy can overcome intermolecular forces of attraction. How will the viscosity of liquid be affected by the increase in temperature?
A
Increase
B
No effect
C
Decrease
D
No regular pattern will be followed