Which of the statements about solution of electrolytes is not correct?

Options

A. Conductivity of solution depends upon size of ions.
B. Conductivity depends upon viscosity of solution.
C. Conductivity does not depend upon solvation of ions present in solution.
D. Conductivity of solution increases with temperture.

Explanation

To determine which statement about the solution of electrolytes is not correct, we will analyze each statement one by one.

### Step 1: Analyze the first statement
**Statement 1:** Conductivity of solution depends upon the size of ions.

- **Explanation:** This statement is correct. The conductivity of an electrolyte solution is influenced by the size of the ions. Smaller ions can move more freely and quickly through the solution, leading to higher conductivity. Therefore, as the size of the ions decreases, the conductivity increases.

### Step 2: Analyze the second statement
**Statement 2:** Conductivity depends upon the viscosity of the solution.

- **Explanation:** This statement is also correct. In a solution with high viscosity, ions experience greater friction, which impedes their movement. Consequently, higher viscosity results in lower conductivity. Thus, conductivity does depend on the viscosity of the solution.

### Step 3: Analyze the third statement
**Statement 3:** Conductivity does not depend upon the solvation of ions present in the solution.

- **Explanation:** This statement is incorrect. Solvation refers to the interaction between solvent molecules and ions. If ions are highly solvated, their mobility decreases, which in turn reduces the conductivity of the solution. Therefore, conductivity does depend on the solvation of ions.

### Step 4: Analyze the fourth statement
**Statement 4:** Conductivity of a solution increases with the temperature.

- **Explanation:** This statement is correct. As the temperature of the solution increases, the kinetic energy of the ions also increases, leading to greater movement and, consequently, higher conductivity. Therefore, conductivity does increase with temperature.

### Conclusion
After analyzing all the statements, we find that the third statement, which claims that conductivity does not depend upon the solvation of ions present in the solution, is the incorrect statement.

### Final Answer
The statement that is not correct is: **Conductivity does not depend upon the solvation of ions present in the solution.**

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