Among the following,the correct statement is:

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(A) Brownian movement is the random motion of particles suspended in a fluid (a liquid or gas) resulting from their collision with the fast-moving ato

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Brownian movement is more pronounced for smaller particles than for bigger particles.

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(A) Brownian movement is the random motion of particles suspended in a fluid (a liquid or gas) resulting from their collision with the fast-moving atoms or molecules in the fluid.Since smaller particles have less mass,they are more easily affected by these collisions,making the Brownian movement more pronounced for smaller particles compared to bigger particles.Therefore,option $A$ is the correct statement.Metal sulphides are lyophobic (not lyophilic).Hardy-Schulze law states that the coagulating power of an ion depends on its valency,not its size.Charcoal adsorbs gases that are more easily liquefiable; $H_2S$ is more easily liquefiable than $Cl_2$ (due to higher boiling point),so $H_2S$ is adsorbed more.

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