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


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


Solution 1

A wooden table has a definite shape and volume. It is very rigid and cannot be compressed i.e., it has the characteristics of a solid. Hence, a wooden table should be called a solid.

Solution 2

The molecules/particles of wooden table are tightly packed with each other, there is no intermolecular space, it cannot be compressed, it cannot flow, all these characteristics are of solid. So wooden table should be called a solid.

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Chapter 1: Matter in Our Surroundings - Intext Questions [Page 6]


NCERT Science Class 9
Chapter 1 Matter in Our Surroundings
Intext Questions | Q 3.4 | Page 6

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'A substance has a definite shape as well as a definite volume'. Which physical state is represented by this statement?

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

State two characteristic properties of a solid.

How do solids, liquids and gases differ in shape and volume?

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.

What are fluids? Give two examples

Give reasons

Liquids and gases flow but solids do not?

Give reasons

When an empty gas jar is inverted over a gas jar containing a coloured gas, the gas also spreads into the empty jar

Fill in the blanks:

______ and ______ can flow.

Write whether the following statements are true or false:

Only water can exist in three different states

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

Particles move about very quickly but do not leave the surface

Describe simple experiments to prove that solids have a definite volume

Describe simple experiments to prove that liquids have no definite shape

Describe simple experiments to prove that gases have mass.

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

Magnesium reacts with dilute hydrochloric acid, liberating hydrogen gas.

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.

Particles in solids are free to move.

Strainer is a kind of sieve which is used to separate a liquid from solid.

Complete the given analogy.

Solid: Definite shape:: ______: Shape of the vessel.

Match the following.

Srl. no. A B C
i Separation of visible undesirable components Water mixed with chalk powder Magnetic Separation
ii Separation of heavier and lighter components Sand and water Decantation
iii Separation of insoluble impurities Iron impurities Filtration
iv Separation of magnetic components from non-magnetic components Rice and stone Hand-picking
v Separation of solids from liquids Husk and paddy Winnowing

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

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

What is the physical state of water at-


Solids are compressible.

Complete the Analogy:

Solids: incompressible:: Gas: ______.

Choose the odd one:

The feather and paper cup can float on the water.

Define the term ‘Diffusion’.

Which of the following are homogeneous in nature?

  1. ice
  2. wood
  3. soil
  4. Air

______ 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:


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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