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Diffusion - class-XII

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Multiple Choice

Choose the best definition for 'diffusion' from the following.

  1. Passive movement from an area of greater concentration to one of lesser concentration
  2. Active movement from an area of greater concentration to one of lesser concentration
  3. Passive movement from an area of lesser concentration to one of greater concentration
  4. Active movement from an area of lesser concentration to one of greater concentration
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