Which of the following is/are in random motion? i. Pollen grains in water ii. The…

Which of the following is/are in random motion? i. Pollen grains in water ii. The molecules of hydrogen gas ii. Fine chalk particles floating in air
  • A.
    i and ii only
  • B.
    i and iii only
  • C.
    ii and iii only
  • D.
    i, ii and iii
Correct Answer: Option D
Explanation
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