Tamil Nadu Board of Secondary EducationSSLC (English Medium) (5 to 8) Class 8

Identify the state of matter based on the arrangement of the molecules. - Science


Identify the state of matter based on the arrangement of the molecules.


  • A - Gas, B - Solid, C - Liquid

  • A - Liquid, B - Solid, C - Gas

  • A - Gas, B - Solid, C - Liquid

  • A - Liquid, B - Gas, C - Solid



A - Gas, B - Solid, C - Liquid

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Chapter 9: Matter around us - Exercises [Page 102]


Tamil Nadu Board Samacheer Kalvi Class 8th Science Answers Guide
Chapter 9 Matter around us
Exercises | Q I. 9. | Page 102


Give reasons:- A wooden table should be called a solid.

Give one example of the diffusion of a solid in another solid.

State two characteristic properties of a solid.

Arrange the following substances in increasing order of force of attraction between their particles (keeping the substance having the minimum force of attraction first) : Water, Sugar, Oxygen

Give two reasons to justify that An iron almirah is a  solid.

Compare the properties of solids, liquids and gases in tabular form.

Give two reasons for saying that wood is a solid.

Name the smallest particle from which matter is made up.

Fill in the blanks:

The physical state of a substance, which has neither fixed volume nor fixed shape is a ______.

For the following statement, say whether it describes a solid, a liquid or a gas.

Particles are quite close together

Fill the following chart showing twelve solids, twelve liquids, four gases and eight materials.

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.

Describe simple experiments to prove that solids have mass

Describe simple experiments to prove that liquids have mass

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.

Complete the statement given below by selecting the correct word.

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

See the given pictures and write down the state of each object. (Solid, Liquid, Gas)

_____ ______ ______ ______ ______
______ _______ ______ ______ ______

Write the states of water.

Which of the following are the states of matter?

Which of the following is a solid?

______ soil is suitable for growing cotton.

Discuss briefly on three states of matter.

In solids, the space between the particles is less than in ______.

Particles in solids are free to move.

Complete the given analogy.

Solid: Rigidity:: Gas: ______

A rubber ball changes its shape on pressing. Can it be called a solid?

What is the physical state of water at-


Solids are compressible.

Complete the Analogy:

Solids: incompressible:: Gas: ______.

Choose the odd one:

Intermolecular forces of attractions are maximum in ______.

The force of attraction between liquid particles is more than solid particles.

How the matter is grouped on the basis of physical states?

Define the term ‘Diffusion’.

______ particles are tightly packed into a definite shape.

The tendency of particles to spread out in order to occupy the available space is ______.

What is the physical state of water at:


What is the physical state of water at:


A strong current of trivalent gaseous boron passed through a silicon crystal decreases the density of the crystal due to part replacement of silicon by boron and due to interstitial vacancies created by missing Si atoms. In one such experiment, one gram of silicon is taken and the boron atoms are found to be 1000 ppm by weight, when the density of the Si crystal decreases by 12%. The percentage of missing vacancies due to silicon, which are filled up by boron atoms will be ____ g. [Given · Atomic wt. Si= 30, B = 11]

The density of solid Argon is 1.6 ml at - 233°C. If the Argon atom is assumed to be sphere of radius 1.5 × 10-8 cm, then the ______ % of solid Argon is apparently occupied.

[Take : NA = 6 × 1023, Atomic mass of Ar = 40]

The composition of a sample of wustite is Fe0.93O1.0· The iron is present in the form of Fe(III) is ______%.


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