Question

Please give the answer
its urgant
class 9th questions ​

Answer 1

Explanation:

1. air<exhaust from chimney <cotton< water< honey< Chalk<iron
2. (a) given in the image (b)given in the image
3. given in the image
4. given in the image

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Answer 2

1)

General order of density of states of matter is gasesIncreasing order of density is:

air < exhaust from chimneys < cotton < water < honey < chalk < iron.

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2) a)

S.No Property Solid Liquid Gases

1. Shape They have a definite shape They do not have a definite shape They do not have a definite shape

2. Volume They have a definite volume They do not have a definite volume They do not have a definite volume

3. Density They have high-density Liquids have less density than solids Gases have the least density

4. The kinetic energy of particles Least More than solids Maximum

5. Compressibility Negligible Low High

Rigidity: It is the property of matter to resist the change of its shape.

Compressibility: It is the property of matter in which its volume is decreased by applying force.

Fluidity: Matter can flow.

Filled a gas container: On filling, a gas takes the shape of the container.

Shape: Having definite boundaries.

Kinetic energy: It is the energy possessed by the particles of matter due to its motion.

Density: It is the ratio of mass with per unit volume

2) b

Rigidity- The tendency of a substance to maintain their shape when subjected to an external force.

Compressibility- It means the contraction in the volume of a substance under the applied pressure. Liquid and gas are compressible because they have empty space, but solid does not.

Fluidity- Tendency of a particle to flow is known as fluidity. Liquids and gases can flow.

Filling of a gas container- The gases can fill the container with a large amount when we applied external pressure.

Shape- Solids have fixed shape and boundaries. Liquid and gases have no fixed shape and definite boundaries.

Kinetic energy- The energy possessed by particles due to their motion is known as kinetic energy. Gas has maximum kinetic energy as they have more random motion.

3) a

Gases have a negligible intermolecular force of attraction between the particles of gas. The random motion of particles in all the directions is experience in the vessel. Hence, the gas fills completely the vessel in which it is kept.

b)

Due to this intense random motion of particles, the particles hit each other and also hit the walls of the container with a force. These collisions of the gas particles with the walls of the container exert pressure on the walls of the container.

c)

It has a definite shape and volume. It is very rigid and cannot be compressed i.e., it has the characteristics of a solid.

4)

Liquids generally have lower density as compared to solids but ice floats on water. ... These spaces are larger as compared to spaces in water molecules. Thus the volume of ice is greater than water. Hence the density of ice is less than of water.

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