Allied solutions simplified middle school chemistry class 6 Solutions for Chapter 3 matter

Q1) Explain the term ‘matter’.One kind of matter can be distinguished from another by its physical properties and chemical properties. State the main physical properties of matter.

Q2) The three main states of matters are solids, liquids and gases. Compare the three states with reference to the following characteristics of matter -

(a) Volume

(b) Shape

(c) Compressibility

(d) Diffusion

Q3) 3. Matter in any state is composed of particles. Compare the three states of matter i.e. solids, liquids and gases with reference to:

(a) Intermolecular space

(b) Intermolecular force of attraction

(c) Movement of particles

Q4) Describe simple experiments to prove that - solids

(a) Occupy space

(b) Have mass

(c) Have a definite volume

Q5) Describe simple experiments to prove that - liquids

(a) Have mass

(b) Have a definite volume

(c) Have no definite shape

Q6) Describe simple experiments to prove that - gases

(a) Occupy space

(b) Have mass

(c) Have no definite volume or shape.

Q7) . Explain the term ‘interconversion of matter’. With reference to ice, water and water vapour show diagrammatically the change of state of matter from solid to liquid to gaseous and back to original state.

Q8) Explain the terms:

(a) Melting

(b) Vaporization

(c) Condensation

(d) Freezing

(e) Melting point

(f) Boiling point

Q9) State what would you observe if

(a) Sugar is added to pebbles taken in a plastic beaker.

(b) Sand is added to glass balls in a beaker.

What would you conclude with this imaginative demonstration?

Q10) With the help of a simple diagram how would you show that - solids expand on heating.

Q11) Give reasons for the following:

(a) Solids have a definite shape and are highly rigid while gases have no definite shape and are least rigid.

(b) Sugar can be distinguished from talcum powder using water.

(c) Water on freezing turns into ice.

(d) A bottle of perfume on opening evolves an odour which can be sensed over a long distance.

Q12) Complete the statements given below by selecting the correct word/s:

(a) Solids and liquids have a definite ______ but gases do not. ( mass, shape, volume )

(b) The space between atoms in gases is maximun while in ______ is minimum. ( solids, liquids, gases)

(c) Conversation of a vapour into a liquid is called ______ . (vaporization , condensation, freezing )

(d) ______ is an example of a crysatlline substance. (wax, sugar, tea)

Q13) State which of the following statements are false. If fase, write the correct statements.

(a) Solids are highly compressible and rigid.

(b) Atoms/molecules in gases move only about their own positions.

(c) The conversion of water to ice is called freezing.

Q1) Fill in the blanks with correct word/s :

1. From the three states of matter, _________ expand the least.

2. Brownian movement is maximum in _________ .

3. Cohesive forces are negligible in _________ .

4. Matter can change from one state to another by change in _________ .

5. The space between atoms(molecules) of solid is _________ .

6. Intermingling of molecules is called _________ .

7. Ice on absorption of heat converts to 'X' a procee called _________ . 'X' changes to water vapour on _________ . Water vapour changes back to 'X' on _________ . The constant temperature at which ice changes into 'X' is called its _________ .

Q2) State which of the following are physical properties of a substance:

1. Chlorine gas has a - strong irritating odour.
2. Sodium nitrate is soluble in water, but calcium carbonate is not.
3. Magnesium reacts with dilute hydrochloric acid, liberating hydrogen gas.
4. Manganese dioxide, a catalyst which alters the rate of a chemical reaction is black in colour.
5. The melting point of ice is 0°C
6. Lead chloride reacts with barium sulphate to give a white precipitate of lead sulphate.
7. Water acidified with dilute sulphuric acid is a good conductor of electricity.
8. Naphthalene on heating directly turns into vapour.
9. Hydrogen sulphide gas has a strong rotten egg odour.
10. Sulphur is a yellow amorphous powder insoluble in water.

Q3) Match the characteristics of the three states of matter in List I with their correct answer from List II:

Q4) Match the arrangement of atoms in the three states of matter in List I with the correct state in List II

Q5) State the correct answer from A, B, C, D, E or F in List II which represents the change of state of matter or its relevant property from List I