MATTER (Chemistry)

A) DEFINE:

1) interconversion of the three state of matter.

2) melting 

3) melting point 

4) solidification 

5) boiling point

6) Vaporization 

7) condensation 

8) sublimation 

9) freezing point  

B) Fill in the blanks with correct word from the words in brackets to complete each sentence.

1) Interconversion of matter is__ (affected/not affected) by changes in conditions such as temperature and pressure.

2) As per kinetic theory of matter all method in any state is composed of ___(molecules/ atoms or ions /molecules, atoms or ions).

3) The interparticle attractive force____ (increases/decreases) with increasing distance between particles.

4) The particles are in continuous random motion and pocesses kinetic energy which__(increases /decreases) on application of heat.

5) Forces of attraction of particles of matter in gases is__ (large/negligible)

6) The quantity of a matter presents its__ while the gravitational pull its_____(weight/mass).

7) ___(iodine/naphthalene) is an example of a solid which sublimes in the absence of heat.

8) Solidification is also termed as ___( fusion/freezing).

9) The kinetic energy of molecules in a solid is___ (low/very large).

10) In ammonium chloride, the intermolecular force is___(high/ low).

C) Select the correct word from the terms A to F given below, correlating with each statements 1 to 5.

1) process of change from gaseous state to liquid state without fall in temperature.

2) process of change from liquid state to solid state to at a particular temperature.

3) temperature at which liquid changes into gaseous state at a press. of 760 mm of Hg.

4) process of change from liquid state to gaseous state.

5) temperature at which liquid changes into a solid at a pressure of 760mm.

A) Solidification point

B) Vaporization 

C) melting point 

D) Solidification

E) boiling points

F) liquification.

D) GIVE REASON:

1) solid, liquid and gases are considered as a matter, but light is not.

2) On heating a solid at its melting point the intermolecular distance of the particles increases.

3) On heating a liquid at its boiling point, heat energy is converted to potential energy.

4) Sublimable solids directly change to gaseous state on heating.

5) At its freezing point a liquid changes into a solid.

E) Fill in the blanks given below with the words "increases" or "decreases" in each case.

1) During solidification or freezing, the intermolecular force of attraction _____.

2) On heating a liquids at its boiling point, the intermolecular distance.

3) Ice melts at 0°C. At its melting point, the intermolecular force of attraction.

4) Change from gaseous state to liquid state results due to ___

5) On heating a Sublimable solid, the intermolecular force of attraction_____.

F) Explain the change of state of matter on the basis of kinetic theory of matter with reference to---

1) Melting -- on heating a solid at its melting point.

2) Solidification -- on cooling a liquid at its freezing point.

3) Vaporization -- on heating a liquid at its boiling point.

4) Condensation -- on cooling a gas.

5) Sublimation -- on heating a Sublimable solid.

G) Name the following:

1) the change of state in which naphthalene changes to vapour.

2) common substance which exists in all the three states of matter.