Question

give reason
c)the odour of the perfume spreads in a room ​

Answer 1

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Each state of matter has space between it . Air also being a matter has spaces between it. The particles of perfume get into the spaces between the air molecules through the process of diffusion.

Diffusion is the process by which two matter intermix on thier own.

So , the odour of perfume spreads into the room.

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Supplementary information :

• Properties of matter :

1. Has mass
2. Occupies space
3. Has inertia
4. Shows density
5. Has spaces between particles

• There are 3 types of matter :

1. Solid
2. Liquid
3. Gas

Answer 2

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$\tt\implies$When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air.

$\tt\implies$The particles of smelly gas are free to move quickly in all directions.

$\tt\implies$They eventually spread through the whole room from an area of high concentration to an area of low concentration.