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Chemistry CBSE Live product
Class 9
Matter in our surroundings
PT1 Revision
2.
Diffusion in gases
Question:
1
m.
Choose the correct answer:
When a perfume bottle is opened in one corner of a room, the delightful fragrance eventually reaches the opposite corner. This shows that ________.
particles of matter are constantly moving
The room has fan which circulates the perfume
Perfume molecules are heavier than air
none of the above
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