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Chemistry CBSE Live product
Class 8 (2026-27)
Particulate Nature of Matter
How particles move in different States of Matter?
9.
TBQ - Diffusion
Question:
4
m.
Help
Moshitha
to
answer the following
based on the image:
1.
What change happens to iodine in the jar?
Solid iodine changes into iodine vapour
Iodine settles at the bottom without changing
Solid iodine changes into liquid iodine
Iodine freezes into a harder solid
2.
Is heating necessary for spreading in this setup?
Yes, diffusion cannot occur at room temperature
Yes, heating is required for the vapour to move
No, heating creates air currents that alone cause spreading
No, the vapour spreads naturally due to particle motion
3.
Why is diffusion fastest in gases?
Particles move freely and have very weak attractive forces between them
Particles can move barely as they are closely packed
Particles cannot move freely and they are fixed
Particles move freely and have very strong attractive forces between them
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