Characteristics of Particles of Matter

Q.

State three properties of molecules of a matter.

Q. An aqueous solution is 1m in ki. Which change will cause the vapour pressure of the solution to increase? 1 addition of nacl 2 addition of na2so4 3 addition of 1 m ki 4 addition of water

Q.

The fragrance of perfume spreads in a room? Give reason?

Q. Try to break a piece of chalk, a piece of charcoal and a piece of iron.
In which of the above three substances would you find the force of attraction between the particles to be highest?

1. Piece of chalk
2. Force of attrcation is same in all the substances
3. Piece of iron
4. Piece of charcoal

Q.

What do you meant by "matter is not continuous"

Q.

Give a simple activity/experiment to show that the rate of diffusion increases with rising temperature.

Q.

The kinetic energy of the particles increases with an increase in the temperature.

1. Decreases

2. Increases

Q. 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.

Q.

On the basis of kinetic theory of matter state two special properties which differentiate gases from solids and liquids.

Q.

Particles of matter possess kinetic energy and they are constantly in motion.

1. False

2. True

Q.

A boy poured honey into a bowl, he tried to break the flow of honey with his fingers but found it difficult, which of the following may be the reason?

1. Particles of honey have large intermolecular distance compared to gases.

2. Particles of honey are rigid.

3. Particles of honey attract each other.

4. Particles of honey repel each other.

Q.

Assertion:- When 2 ml of dettol is dissolved in water then we get the smell of dettol from the water. We put this solution containing dettol in another beaker containing clear water and they are mixed in the ratio of 9:1 (9 parts of clear water to 1 part of dettol solution) at every step of dilution then it takes infinite similar steps to get a water free from smell of dettol

Reason:- Particles of matter are too tiny in size.

1. Assertion:- False

   Reason:- True

2. Assertion:- False

   Reason:- False

3. Assertion:- True

   Reason:- True

4. Assertion:- True

   Reason:- False

Q.

Who was the first to give the evidence for existence and movement of particles in liquid?

1. John Dalton

2. Maharshi Kannada

3. Democritus

4. Robert Brown

Q.

A gas in air which dissolve in water by diffusion.

Q.

When sodium chloride is added to a definite volume of water and stirred well, a solution is formed, but there is no increase in the level of water. Why?

Q.

Law of conservation of mass holds true for physical changes.

1. True

2. False

Q. Among the given states of water, which one has the maximum intermolecular force of attraction between its particles?

1. Ice
2. Water vapour
3. Water
4. Same in all the states

Q. John wants to understand the rate of diffusion of ink into water. So, he took four glasses A, B, C and D filled with water and each kept at a temperature of ${10}^{0}C$, ${20}^{0}C$, ${30}^{0}C$ and ${40}^{0}C$ respectively. Now John put 3 drop of blue ink slowly and carefully along the sides of all the glasses and left them undisturbed.
In which of the following glass, the number of days taken for the colour of the ink to spread evenly throughout the water will be minimum ?

1. Glass A
2. Glass B
3. Glass C
4. Glass D

Q.

1. What do you mean by Diffusion?

2. What is the relationship between temperature, kinetic energy and rate of diffusion?

Q.

Can you give some questions about matter??

At least ten questions

Q.

The molecules of water have more energy compared to the molecules of ice at the same temperature. Justify.

Q.

What is meant by inter-molecular forces of attraction? How do they carry in solids, liquids and gases?

Q. (I) Adding a small amount of pink powdered Potassium permanganate to a beaker of water turns the entire solution in the beaker to pink.
(II) Particles of matter show the property of diffusion.

Identify the correct option out of the following.

1. Both (I) and (II) are correct and (II) is the correct explanation of (I)
2. Both (I) and (II) are correct but (II) is not the correct explanation of (I)
3. (I) is incorrect and (II) is correct
4. Both are incorrect

Q.

Particles of the matter show continuous random movements.

1. True

2. False

Q.

Molecules in matter are always in a state of _________( rest/ motion).

Q.

State diffusion. Why do gases show the property of diffusion?

Q. What are the characteristics of particles of matter?​

Q.

The level of water in a beaker rises when a spoon full of sugar/salt is added to it.

1. True

2. False

Q.

In which state of matter, the constituent of molecules are closely packed?

Q.

Why can a piece of chalk be broken easily into smaller pieces while a coal piece cannot be broken easily ?