State in Which of the Three States of Matter: the Movement of the Particles is Neither About Their Own Positions Nor in Any Random Direction. - Chemistry

One Word Answer

State in which of the three states of matter:

The movement of the particles is neither about their own positions nor in any random direction.




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Chapter 1: Matter and Its Composition - Exercise


Viraf J. Dalal Class 7 New Simplified Middle School Chemistry
Chapter 1 Matter and Its Composition
Exercise | Q 7.4


Give reasons for the following observation:

The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.

A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?

Fill in the blank:

The temperature at which a liquid starts changing into its vapour state is ______.

What do you observe when a gas jar which appears empty is inverted over a gas jar containing Bromine vapours? Name the phenomenon.

 Fill in the blank:

Water is a matter because it has mas and occupies....................

Write true or false for statement. Rewrite the false statement correctly.

Solids can be compressed easily.

For the following statement, say whether it describes a solid, a liquid or a gas.
Particles are far apart and move in all directions.

Give two examples of the following:

Substances which do not change their states.

The state of matter which has no definite shape or volume is called

  1. solid
  2. liquid
  3. gas
  4. water

All kinds of matter

  1. occupy space and have definite mass
  2. have mass and definite shape
  3. can change their states
  4. have definite volume

A solid is a state of matter that has

  1. no definite shape.
  2. large intermolecuiar space.
  3. high intermolecuiar force of attraction.
  4. no definite volume.

Which of the following is a property of the liquids ?

  1. they can flow
  2. they are malleable
  3. they have a definite shape
  4. they are rigid

What is volume ?

What is mass ?

How will you prove by an experiment that solids occupy space ?

Give reason of Why do liquids and gases flow but solids do not ?

Give reason

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 blank

Molecules in a ________ are packed very closely.

When sugar is dissolved in water, there is no increase in the volume. Which characteristic of matter is illustrated by this observation?

When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?

What is the general name of :

  1. rigid form of matter ?
  2. fluid forms of matter ?

Fill in the following blank with suitable words :

The smell of perfume gradually spreads across a room due to .....................

State two characteristics of matter demonstrated by diffusion.

What is meant by 'diffusion'? Give one example of diffusion in gases.

In which of the following conditions, the distance between the molecules of hydrogen gas would increase?

  1. increasing pressure on hydrogen contained in a closed container
  2. some hydrogen gas leaking out of the container
  3. increasing the volume of the container of hydrogen gas
  4. adding more hydrogen gas to the container without increasing the volume of the container

Which one of the following statements is not true?

  1. the molecules in a solid vibrate about a fixed position
  2. the molecules in a liquid are arranged in a regular pattern
  3. the molecules in a gas exert negligibly small forces on each other, except during collisions
  4. the molecules of a gas occupy all the space available

Define: diffusion

 Define: interconversion of states of matter.

What are the two conditions for the interconversion of states of matter?

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.

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

Fill in the blank with the correct word Given below.

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

Define the Liquid and give two examples.

Name the three states of matter.

Each of the three states of matter has mass. Explain with the help simple experiments – that each state of matter has mass.

A glass beaker is half-filled with water and an empty glass tumbler is inverted & lowered inside the glass beaker. State your observations on tilting the tumbler below the level of the water in the glass beaker. Give a reason for your answer.

200 ml of water is poured into a bowl of 400 ml capacity. The volume of water will be ______.

Among the following ______ is not a mixture.

Water obtained from tube wells is usually ______ water.

Air is not compressible.

Match the following.

Property Example
Breaks easily (Brittle) Metal pan
Bends readily Rubber band
Can be stretched easily Cotton wool
Gets compressed easily Mud pot
Gets heated readily Plastic wire

Mr. Raghu returns home on a hot summer day and wants to have buttermilk. Mrs. Raghu has the only curd. What can she do to get buttermilk? Explain

In a glass containing some water, tamarind juice and sugar are added and stirred well. Is this a mixture? Can you tell why? Will this solution be sweet or sour or both sweet and sour?

Which one of the following element name is not derived from planet?

The Cow and Birds are nonliving things.

Mention any two characteristics of the particles of matter.


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