Choose the given statement is true/false:

The cause of Brownian movement which is not shown by true solutions or suspensions is due to:

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Unbalanced bombardment of particles by molecules of the dispersion medium.

Attractive forces between dispersed phase and dispersion medium

Larger size of the particles due to which they keep colliding and settling down

Conversion currents formed in the sol.

answer is A.

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Detailed Solution

Concept- Brownian motion is the name given to the random movement of particles of a liquid or a gas.
Brownian motion is defined as the uncontrolled or unstable motion of particles in a liquid due to constant collisions with other fast-moving molecules.

It has been observed that the random movement of particles is usually stronger as the particles are smaller, for a less viscous liquid and at higher temperatures. These are also some factors that affect the movement of particles in a liquid.

Now, the true solutions and suspension have a very small particle size, due to which either they do not collide or their collision is not visible. The cause of Brownian movement which is not shown by true solutions or suspensions is the unbalanced bombardment of particles by molecules of the dispersion medium.
Hence, the correct option is 1.

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