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2
MCQ (Single Correct Answer)

Which of the following property of water can be used to explain the spherical shape of rain droplets?

A
Viscosity
B
Surface tension
C
Critical phenomena
D
Pressure
3
MCQ (Single Correct Answer)

A plot of volume $(V)$ versus temperature $(T)$ for a gas at constant pressure is a straight line passing through the origin. The plots at different values of pressure are shown in figure. Which of the following order of pressure is correct for this gas?

A
$p_1>p_2>p_3>p_4$
B
$p_1=p_2=p_3=p_4$
C
$p_1< p_2< p_3< p_4$
D
$p_1< p_2=p_3< p_4$
4
MCQ (Single Correct Answer)

The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting particles but their magnitude depends upon

A
charge of interacting particles
B
mass of interacting particles
C
polarisability of interacting particles
D
strength of permanent dipoles in the particles
5
MCQ (Single Correct Answer)

Dipole-dipole forces act between the molecules possessing permanent dipole. Ends of dipoles possess 'partial charges'. The partial charge is

A
more than unit electronic charge
B
equal to unit electronic charge
C
less than unit electronic charge
D
double the unit electronic charge
6
MCQ (Single Correct Answer)

The pressure of a 1:4 mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen?

A
$0.8 \times 10^5 \mathrm{~atm}$
B
$0.008 \mathrm{Nm}^{-2}$
C
$8 \times 10^4 \mathrm{Nm}^{-2}$
D
0.25 atm
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