The fragrance of an incense stick lighted in one corner of a room spreads in the whole room quickly. It shows that

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Particles of matter are constantly moving in all direction

Particles of matter have space between them

Particles of matter attract each other

None of the above

answer is A.

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Detailed Solution

The fragrance of an incense stick lighted in one corner of a room spreads in the whole room quickly. It shows that particles of matter are constantly moving in all directions.
Gas is a physical state of matter in which particles move randomly in free space. When we lit an incense stick in one corner, it spread throughout the whole room. It is because particles of matter present in incense sticks are moving in all directions from higher to lower concentration. This is an example of diffusion.

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