PHYSICS

JAMB 2012 - Question 25

Physics 2012 JAMB Past Questions - Question 25: I.it is a rapid ,constant and irregular motion of tiny particles II.It gives evidence that tiny particles of matter called molecules exist .III. it takes place only in gases IV. it gives evidence that molecules are in a constant state of random motion .Which of the combination above is correct about Brownian motion?

Choose the correct answers from the options given.
I.it is a rapid ,constant and irregular motion of tiny particles II.It gives evidence that tiny particles of matter called molecules exist .III. it takes place only in gases IV. it gives evidence that molecules are in a constant state of random motion .Which of the combination above is correct about Brownian motion?
A:
B:
C:
D:
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Correct Answer

D

Explanation

Brownian motion takes place in gases and liquid. therefore option iii is wrongThe correct combination about Brownian motion is:

II. It gives evidence that tiny particles of matter called molecules exist.
IV. It gives evidence that molecules are in a constant state of random motion.

Brownian motion is the random motion of small particles suspended in a fluid (liquid or gas) resulting from their collision with fast-moving atoms or molecules in the gas or liquid. It provides strong evidence for the existence of molecules and their constant, random motion. It is not limited to gases (III) and can occur in liquids as well.