Viraf J. Dalal solutions for New Simplified Middle School Chemistry [English] Class 6 chapter 3 - Matter [Latest edition]

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.

The three main states of matter 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.

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) the intermolecular force of attraction
(c) movement of particles

Describe simple experiments to prove that solids occupy space

Describe simple experiments to prove that solids have mass

Describe simple experiments to prove that solids have a definite volume

Describe simple experiments to prove that liquids have mass

Describe simple experiments to prove that liquids have a definite volume

Describe simple experiments to prove that liquids have no definite shape

Describe simple experiments to prove that gases occupy space.

Describe simple experiments to prove that gases have mass.

Describe simple experiments to prove that gases have no definite volume or shape.

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 the original state.

Explain the term melting

Explain the term vaporization

Explain the term condensation

Explain the term freezing

Explain the term melting point

Explain the term boiling point

State what would you observe if

(a) sugar is added to pebbles take in a plastic beaker
(b) sand is added to glass balls in a beaker.  What would you conclude from this imaginative demonstration?

With the help of a simple diagram how would you show that – solids expand on heating

Give reasons for the following:

Solids have a definite shape and are highly rigid while gases have to definite shape and are least rigid.

Give reasons for the following:

Sugar can be distinguished from talcum powder using water.

Give reasons for the following:

Water on freezing turns into ice.

Give reasons for the following:

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

Complete the statement given below by selecting the correct word.

Solids and liquids have a definite ____ but gases do not.

Complete the statement given below by selecting the correct word.

The space between atoms in gases is maximum while in ____ is minimum,

Complete the statement given below by selecting the correct word.

The conversation of vapour into a liquid is called ____.

Complete the statement given below by selecting the correct word.

____ is an example of a crystalline substance.

State which of the following statement is true or false. If false write the correct statement.

Solids are highly compressible and rigid.

State which of the following statement is true or false. If false write the correct statement.

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

State which of the following statement is true or false. If false write the correct statement.

The conversion of water to ice is called freezing.

Fill in the blank with the correct word Given below.

From the three states of matter, _____ expand the least.

Fill in the blank with the correct word Given below.

Brownian movement is maximum in ____.

Fill in the blank with the correct word Given below.

Cohesive forces are negligible in ____

Fill in the blank with the correct word Given below.

Matter can change from one state to another by the change in ____

Fill in the blank with the correct word Given below.

The space between atoms’ [molecules] of solids is ____

Fill in the blank with the correct word Given below.

Intermingling of molecules is called ____

Fill in the blanks with the correct word/s from the bracket.

Ice on absorption of heat converts to ‘X’ a process called ____ [vaporization / melting]. ‘X’ changes to water vapour on ____ [heating / cooling]. Water vapour changes back to ‘X’ on ____ [freezing / condensation]. The constant temperature at which ice changes into ‘X’ is called its ____ [fusion point / melting point / boiling point].

State the property of the following substance.

Chlorine gas has a – strong irritating odor.

State the property of the following substance.

Sodium nitrate is soluble in water, but calcium carbonate is not.

State the property of the following substance.

Magnesium reacts with dilute hydrochloric acid, liberating hydrogen gas.

State the property of the following substance.

Manganese dioxide, a catalyst which alters the rate of a chemical reaction is black in colour.

State the property of the following substance.

The melting point of ice is 0°C.

State the property of the following substance.

Lead chloride reacts with barium sulphate to give a white precipitate of lead sulphate.

State if the following is a physical property of a substance.

Water acidified with dilute sulphuric acid is a good conductor of electricity.

State the property of the following substance.

Naphthalene on heating directly turns into vapour.

State the property of the following substance.

Hydrogen sulphide gas has a strong rotten egg odour.

State the property of the following substance.

Sulphur is a yellow amorphous powder insoluble in water.

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

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

State the correct term 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.