Intermolecular force of attraction is maximum in ___________

Gases are liquified under ______________

Particles of a liquid  _________

Which of the following decreases the rate of evaporation?

Gases can be easily compressed because these have least intermolecular interactions_________

The intermixing of particles of two substances on their own is known as __________

The rate of diffusion of all substances is higher in liquids state than in _________

The state of matter can be changed by changing ........... or ...........

Rate of evaporation increases with ......... of the vessel.

The sun and stars glow because of the presence of .......... in them.

Why is ice at 273 K more effective in cooling than water at the same temperature?

Why are light and sound not considered as matter?

Give one similarity and one dissimilarity between a liquid and a gas.

Which phenomenon occurs during the following changes?
(a) Formation of clouds
(b) Drying of wet clothes
(c) Wax melts in the sun
(d) Size of naphthalene balls decreases.

Suggest a method to liquefy atmospheric gases.

What produces more severe burns, boiling water or steam?

If you open a bottle of perfume in one corner of a room, it immediately spreads throughout the room.State and explain the property involved.

What are the characteristics of the particle of matter?

When ice at is slowly \(-10°C\)heated, temperature of ice gradually increases till at \(0°C\) , the temperature of the system remains constant when the ice changes into water and then further rises.Explain the observation.

The particles of matter are always moving and are never at rest. At a temperature in any gas, liquid or solid there are particles with different speeds or different amounts of kinetic energy. In case of liquids, a small fraction of the particles at the attraction of other particles and gets converted into vapours.This phenomenon of change of liquid into vapours at any temperature below its boiling point is called evaporation.
How is this property of liquid, particularly, water useful in our daily Give any three examples life.

Nature is complete but very systematic.There is a system which is exhibited by all types of creations and happenings or even human behaviour.That is the phase of transition.This is a so-called equilibrium state.At this stage both the phases are manifested and with a little energy change in any form, either of the two states can be achieved.Natural phenomena though may not be controlled by human power.
Give an account of such equilibrium states when we study states of matter.

A wooden chair is a solid at room temperature.Give two reasons.

Everything in this universe is made up of material which scientists have named matter.A matter is said to have the following characteristics:
(a) Matter is made up of tiny particles
(b) Particles of matter have space between them
(c) Particles of matter are continuously moving
(d) Particles of matter can diffuse into each other
(e) Particles of matter attract each other
Give experiences of your daily life to justify above characteristics of matter.