There is little attraction between particles of gas. Thus, gas particles move freely in all directions. Therefore, gas completely fills the vessel in which it is kept. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
There is little attraction between particles of gas. Thus, gas particles move freely in all directions. Therefore, gas completely fills the vessel in which it is kept.
The ability of a diver to cut through water in a swimming pool shows that matter is made up of particles. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
The ability of a diver to cut through water in a swimming pool shows that matter is made up of particles.
For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/ a) Water at 250°C exists in gaseous state. b) At 100°C, water can exist in both liquid and gaseous form. At this temperature, after getting the heat equal to the latent heat of vaporization, wRead more
a) Water at 250°C exists in gaseous state.
b) At 100°C, water can exist in both liquid and gaseous form. At this temperature, after getting the heat equal to the latent heat of vaporization, water starts changing from liquid state to gaseous state.
The mass per unit volume of a substance is called density (density = mass/volume). As the volume of a substance increases, its density decreases. Though ice is a solid, it has large number of empty spaces between its particles. These spaces are larger as compared to the spaces present between the paRead more
The mass per unit volume of a substance is called density (density = mass/volume).
As the volume of a substance increases, its density decreases.
Though ice is a solid, it has large number of empty spaces between its particles. These spaces are larger as compared to the spaces present between the particles of water. Thus, the volume of ice is greater than that of water. Hence, the density of ice is less than that of water. A substance with lower density than water can float on water. Therefore, ice floats on water.
1. Rigidity can be expressed as the tendency of matter to resist a change in shape. 2. Compressibility is the ability to be reduced to a lower volume when force is applied. 3. Fluidity is the ability to flow. 4. By filling a gas container we mean the attainment of shape of the container by gas. 5.ShRead more
1. Rigidity can be expressed as the tendency of matter to resist a change in shape.
2. Compressibility is the ability to be reduced to a lower volume when force is applied.
3. Fluidity is the ability to flow.
4. By filling a gas container we mean the attainment of shape of the container by gas.
5.Shape defines a definite boundary.
6. Kinetic energy is the energy possessed by a particle due to its motion.
7. Density is mass per unit volume.
The differences in the characteristics of states of matter are given in the following table. Solid state: 1. Definite shape and volume. 2. Incompressible 3. There is little space between the particles of a solid. 4. These particles attract each other very strongly. 5. Particles of solid cannot moveRead more
The differences in the characteristics of states of matter are given in the following table.
Solid state:
1. Definite shape and volume.
2. Incompressible
3. There is little space between the particles of a solid.
4. These particles attract each other very strongly.
5. Particles of solid cannot move freely.
Liquid state:
1. No definite shape. Liquids attain the shape of the vessel in which they are kept.
2. Compressible to a small extent.
3. These particles have a greater space between them.
4. The force of attraction between liquid particles is less than solid particles.
5. These particles move freely.
Gaseous state:
1. Gases have neither a definite shape nor a definite volume.
2. Highly compressible
3. The space between gas particles is the greatest.
4. The force of attraction is least between gaseous particles.
5. Gaseous particles are in a continuous, random motion.
The given substances in the increasing order of their densities can be represented as: Air < Exhaust from chimney < Cotton < Water < Honey < Chalk < Iron For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
The given substances in the increasing order of their densities can be represented as: Air < Exhaust from chimney < Cotton < Water < Honey < Chalk < Iron
• The characteristics of particles of matter are: • Particles of matter have spaces between them. • Particles of matter are continuously moving. • Particles of mater attract each other. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
• The characteristics of particles of matter are:
• Particles of matter have spaces between them.
• Particles of matter are continuously moving.
• Particles of mater attract each other.
Solids diffuse at a very slow rate. But, if the temperature of the solid is increased, then the rate of diffusion of the solid particles into air increases. This is due to an increase in the kinetic energy of solid particles. Hence, the smell of hot sizzling food reaches us even at a distance, but tRead more
Solids diffuse at a very slow rate. But, if the temperature of the solid is increased, then the rate of diffusion of the solid particles into air increases. This is due to an increase in the kinetic energy of solid particles. Hence, the smell of hot sizzling food reaches us even at a distance, but to get the smell from cold food we have to go close.
Anything that occupies space and has mass is called matter. Matter can exist in three physical states—solid, liquid, and gaseous. Chair and almond are forms of matter in the solid state. Cold drink is a liquid state of matter. Air and smell of perfume are gaseous states of matter. Note: The sense ofRead more
Anything that occupies space and has mass is called matter. Matter can exist in three physical states—solid, liquid, and gaseous.
Chair and almond are forms of matter in the solid state.
Cold drink is a liquid state of matter.
Air and smell of perfume are gaseous states of matter.
Note: The sense of smell is not matter. However, the smell or odour of a substance is classified as matter. The smell of any substance (say, perfume) is the gaseous form of that substance which our olfactory system can detect (even at very low concentrations). Hence, smell of perfume is matter.
Give reasons: A gas fills completely the vessel in which it is kept.
There is little attraction between particles of gas. Thus, gas particles move freely in all directions. Therefore, gas completely fills the vessel in which it is kept. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
There is little attraction between particles of gas. Thus, gas particles move freely in all directions. Therefore, gas completely fills the vessel in which it is kept.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?
The ability of a diver to cut through water in a swimming pool shows that matter is made up of particles. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
The ability of a diver to cut through water in a swimming pool shows that matter is made up of particles.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
What is the physical state of water at: a) 250ºC b)100ºC ?
For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/ a) Water at 250°C exists in gaseous state. b) At 100°C, water can exist in both liquid and gaseous form. At this temperature, after getting the heat equal to the latent heat of vaporization, wRead more
For more answers visit to website:
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
a) Water at 250°C exists in gaseous state.
See lessb) At 100°C, water can exist in both liquid and gaseous form. At this temperature, after getting the heat equal to the latent heat of vaporization, water starts changing from liquid state to gaseous state.
Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find out why.
The mass per unit volume of a substance is called density (density = mass/volume). As the volume of a substance increases, its density decreases. Though ice is a solid, it has large number of empty spaces between its particles. These spaces are larger as compared to the spaces present between the paRead more
The mass per unit volume of a substance is called density (density = mass/volume).
As the volume of a substance increases, its density decreases.
Though ice is a solid, it has large number of empty spaces between its particles. These spaces are larger as compared to the spaces present between the particles of water. Thus, the volume of ice is greater than that of water. Hence, the density of ice is less than that of water. A substance with lower density than water can float on water. Therefore, ice floats on water.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.
1. Rigidity can be expressed as the tendency of matter to resist a change in shape. 2. Compressibility is the ability to be reduced to a lower volume when force is applied. 3. Fluidity is the ability to flow. 4. By filling a gas container we mean the attainment of shape of the container by gas. 5.ShRead more
1. Rigidity can be expressed as the tendency of matter to resist a change in shape.
See less2. Compressibility is the ability to be reduced to a lower volume when force is applied.
3. Fluidity is the ability to flow.
4. By filling a gas container we mean the attainment of shape of the container by gas.
5.Shape defines a definite boundary.
6. Kinetic energy is the energy possessed by a particle due to its motion.
7. Density is mass per unit volume.
Tabulate the differences in the characteristics of states of matter.
The differences in the characteristics of states of matter are given in the following table. Solid state: 1. Definite shape and volume. 2. Incompressible 3. There is little space between the particles of a solid. 4. These particles attract each other very strongly. 5. Particles of solid cannot moveRead more
The differences in the characteristics of states of matter are given in the following table.
Solid state:
1. Definite shape and volume.
2. Incompressible
3. There is little space between the particles of a solid.
4. These particles attract each other very strongly.
5. Particles of solid cannot move freely.
Liquid state:
1. No definite shape. Liquids attain the shape of the vessel in which they are kept.
2. Compressible to a small extent.
3. These particles have a greater space between them.
4. The force of attraction between liquid particles is less than solid particles.
5. These particles move freely.
Gaseous state:
See less1. Gases have neither a definite shape nor a definite volume.
2. Highly compressible
3. The space between gas particles is the greatest.
4. The force of attraction is least between gaseous particles.
5. Gaseous particles are in a continuous, random motion.
The mass per unit volume of a substance is called density. (density = mass/volume). Arrange the following in order of increasing density-
The given substances in the increasing order of their densities can be represented as: Air < Exhaust from chimney < Cotton < Water < Honey < Chalk < Iron For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
The given substances in the increasing order of their densities can be represented as: Air < Exhaust from chimney < Cotton < Water < Honey < Chalk < Iron
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
What are the characteristics of the particles of matter?
• The characteristics of particles of matter are: • Particles of matter have spaces between them. • Particles of matter are continuously moving. • Particles of mater attract each other. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
• The characteristics of particles of matter are:
• Particles of matter have spaces between them.
• Particles of matter are continuously moving.
• Particles of mater attract each other.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
Give reasons for the following observation:
Solids diffuse at a very slow rate. But, if the temperature of the solid is increased, then the rate of diffusion of the solid particles into air increases. This is due to an increase in the kinetic energy of solid particles. Hence, the smell of hot sizzling food reaches us even at a distance, but tRead more
Solids diffuse at a very slow rate. But, if the temperature of the solid is increased, then the rate of diffusion of the solid particles into air increases. This is due to an increase in the kinetic energy of solid particles. Hence, the smell of hot sizzling food reaches us even at a distance, but to get the smell from cold food we have to go close.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/
Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume.
Anything that occupies space and has mass is called matter. Matter can exist in three physical states—solid, liquid, and gaseous. Chair and almond are forms of matter in the solid state. Cold drink is a liquid state of matter. Air and smell of perfume are gaseous states of matter. Note: The sense ofRead more
Anything that occupies space and has mass is called matter. Matter can exist in three physical states—solid, liquid, and gaseous.
Chair and almond are forms of matter in the solid state.
Cold drink is a liquid state of matter.
Air and smell of perfume are gaseous states of matter.
Note: The sense of smell is not matter. However, the smell or odour of a substance is classified as matter. The smell of any substance (say, perfume) is the gaseous form of that substance which our olfactory system can detect (even at very low concentrations). Hence, smell of perfume is matter.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-1/