Among the following, the correct statement (s) is (are)

Options

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

Answer

To solve the question, we need to evaluate each statement provided and determine whether it is true or false. Here’s a step-by-step breakdown:

### Step 1: Analyze the first statement
**Statement:** The soles of the metal sulphides are lyophilic.

**Analysis:** Metal sulfides, such as arsenic sulfide, are known to be lyophobic, meaning they do not have an affinity for the solvent. Therefore, this statement is **false**.

### Step 2: Analyze the second statement
**Statement:** The Brownian movement is more pronounced for smaller particles than for bigger ones.

**Analysis:** Brownian movement is caused by the collisions of particles with the molecules of the dispersion medium. Smaller particles experience more frequent and vigorous collisions due to their size, leading to more pronounced Brownian motion. Thus, this statement is **true**.

### Step 3: Analyze the third statement
**Statement:** One would expect charcoal to adsorb chlorine more than hydrogen sulfide.

**Analysis:** Charcoal is known to adsorb gases that are easily liquefiable more effectively. Hydrogen sulfide is more easily liquefiable than chlorine, which means charcoal will adsorb hydrogen sulfide more than chlorine. Therefore, this statement is **false**.

### Step 4: Analyze the fourth statement
**Statement:** The Hardy-Schultz law states that bigger the size of the ion, greater is its coagulating power.

**Analysis:** The Hardy-Schultz law indicates that the coagulating power of an ion is related to its charge and valency. Generally, smaller ions with higher charge density have greater coagulating power. Therefore, this statement is **false**.

### Conclusion
After analyzing all the statements, we find that only the second statement is correct.

### Final Answer
The correct statement is: **Only the second statement is true.**

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