Chapter 5: States of Matter

A person living in Shimla observed that cooking food without using pressure

cooker takes more time. The reason for this observation is that at high altitude:

Which of the following property of water can be used to explain the spherical

the shape of rain droplets?

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 Fig. 5.1. Which of the

following order of pressure is correct for this gas?

The interaction energy of the London force is inversely proportional to the sixth power

of the distance between two interacting particles but their magnitude depends

upon

Dipole-dipole forces act between the molecules possessing permanent dipole.

Ends of dipoles possess ‘partial charges’. The partial charge is

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?

As the temperature increases, the average kinetic energy of molecules increases.

What would be the effect of the increase of temperature on pressure provided the

volume is constant?

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 H2 He O2 N2

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

What is the SI unit of viscosity coefficient (η)?

Atmospheric pressures recorded in different cities are as follows:

Cities Shimla Bangalore Delhi Mumbai

p in N/m2 1.01×105 1.2×105 1.02×105 1.21×105

Consider the above data and mark the place at which liquid will boil first.