CHAPTER-5-PHYSICAL STATES OF MATTER

 

Objective Part

Choose the right option.                   10×1=10

A

B

C

D

1

The vapour pressure of a liquid increases with the;

Increase of pressure

Increase of temperature

Increase of intermolecular forces

Increase of polarity of molecule

2

One atmospheric pressure is equal to how many pascals:

101325

10325

106075

10523

3

Diffusion is more rapid in

Liquid

Solid

Gases

None of above

4

The existence of solid in different physical form is called:

Crystals

Allotropy

Evaporation

Transition

5

Boiling points depend upon the nature of:

Liquid

Intermolecular forces

External pressure

All of these

6

_______ are highly mobile and they can be compressed

Solid

Liquid

Gases

None of these

7

Which one of the following is not amorphous

Rubber

Plastic

Glass

Glucose

8

Mass per unit volume is called:

Pressure

Temperature

Density

Solubility

9

Gases exert pressure ______ in all direction.

Randomly

Uniformly

Alternate

Constantly

10

Which one of the following gas diffuses faster?

Hydrogen

Helium

Fluorine

Chlorine

 

 

Subjective

Answer the short questions                    10×2=20

1.      Define diffusion. Explain with example.

2.      What is absolute zero, give its value.

3.      Define the term allotropy with examples.

4.      Define standard atmospheric pressure. What is its unit?

5.      Why the rate of diffusion of gases is rapid than that of liquids?

6.      Define Boyle’s law.

7.      Which form of sulphur exists at room temperature?

8.      Define freezing point.

9.      What are crystalline solid?

10.  Define vapour pressure.

 

                                              Long Questions                     5×1=5

1.      (a) Define boiling point. How it is affected by different factors?                    3

(b) A gas occupies a volume of 800cm3 at 1atm, when it is allowed to expand to 1200cm3. What will be its pressure in mm of Hg?                                               2