Select wrong statement

Options

A. If a very small amount of `AlCl_(3)` is added to gold sol, coagulation occurs, but if a large quantity of `AlCL_(3)` is added, there is no coagulation
B. Organic ions are more strongly adsorbed on charged surfaces in comparison to inorganic ions
C. Both emulsifier and peptising agents stabilise colloids but their actions are different
D. Colloidal solutions are thermodynamically stable

Explanation

To solve the question, we need to analyze the statements provided and identify the incorrect one. Here’s a step-by-step breakdown of the solution:

### Step 1: Analyze the Statements
We have several statements to evaluate:
1. **Statement 1**: A very small amount of AlCl3 is added to a colloidal solution, and coagulation occurs.
2. **Statement 2**: A large quantity of AlCl3 added to a colloidal solution leads to coagulation.
3. **Statement 3**: Organic ions are most strongly adsorbed on charged surfaces.
4. **Statement 4**: Both emulsifiers and peptizing agents stabilize colloids, but their actions are different.
5. **Statement 5**: Colloidal solutions are thermodynamically stable.

### Step 2: Evaluate Each Statement
- **Statement 1**: This statement is misleading. A very small amount of AlCl3 would not cause coagulation; it is typically a larger amount that would lead to coagulation.
- **Statement 2**: This statement is correct. A large quantity of AlCl3 can lead to coagulation due to the neutralization of charges on colloidal particles.
- **Statement 3**: This statement is correct. Organic ions do tend to be adsorbed on charged surfaces due to electrostatic attraction.
- **Statement 4**: This statement is also correct. Emulsifiers and peptizing agents have different mechanisms of stabilizing colloids.
- **Statement 5**: This statement is correct. Colloidal solutions are generally considered thermodynamically stable.

### Step 3: Identify the Wrong Statement
From the analysis, **Statement 1** is the incorrect statement because it suggests that a small amount of AlCl3 can cause coagulation, which is not true. Coagulation typically requires a larger amount of the electrolyte.

### Final Answer
The wrong statement is: **A very small amount of AlCl3 is added to a colloidal solution, and coagulation occurs.**

---