Question

please solve it quickly​

Answer 1

Answer:

1.Matter is everything around you which is made up of particles. It has mass and occupies space. Mass is a physical quantity which expresses the amount of stuff in an object.

3.It is because the particles of matter are in motion due to kinetic energy which increases with temperature..

2nd question i dint understand so sorrry 1st and 3rd answered hope it helps

Explanation:

Answer 2

Answer:

Explanation:

1)The characteristics of particles of matter are: All matter is composed of very small particles which can exist independently. (ii) Particles of matter have spaces between them. (iii) Particles of matter are continuously moving. (iv) Particles of matter attract each other.

2)Given conditions ⇒

Melting Point of A = 78° C

Melting Point of B = 262° C

Melting Point of C = 100° C

Melting Point of D = 168° C

We know, Melting point of the solids are directly proportional to the force of the attraction between its molecules.

∴ Solids having the high force of the attraction between its molecules = Solids having the High melting Point = B

In Descending Order,

B > D > C>A

3)This happens because of the state of matter and thereby, rate of diffusion.

a) Unlit incense stick is solid in state

In solids, molecules are very closely packed, so practically no movement occurs there. It is a rigid body... Thus, the rate of diffusion is the least in solids. Therefore, one can smell unlit incense stick only when we are close to it.

b)Lit incense stick converts into gaseous state

In gases, the molecules are far apart and are in constant random motion. Due to this property of gases, the molecules are able to distribute evenly throughout the space in which they are enclosed...Thus, the rate of diffusion is maximum in gases. Therefore, one can smell lit incense stick from far away.

Hope this helps!!

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