Which one of the following statements is correct?

Options

A. Brownian movement is more pronounced for smaller particles than for bigger ones
B. Sols of metal sulphides are lyophilic
C. Schulze-Hardy law states, the bigger the size of the ion, the greater is its coagulating power
D. One would expect charcoal to adsorb hydrogen gas more strongly than chlorine

Explanation

To determine which statement is correct among the given options, we will analyze each statement one by one.

### Step 1: Analyze the First Statement
**Statement:** Brownian movement is more pronounced for smaller particles than for bigger ones.

**Explanation:** Brownian movement refers to the random motion of particles suspended in a fluid (liquid or gas) resulting from their collision with fast-moving molecules in the medium. Smaller particles experience more frequent and more significant impacts from the surrounding molecules due to their size, leading to more pronounced Brownian motion. Larger particles, on the other hand, are less affected by these collisions, resulting in less noticeable movement.

**Conclusion:** This statement is **correct**.
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