The rate of constatnt depends on

Options

A. temperature
B. pressure
C. extent of reaction
D. Initial concentraton of the rectant

Answer

To determine what the rate constant (k) of a reaction depends on, we can follow these steps:

### Step 1: Understand the Rate Constant
The rate constant (k) is a proportionality factor in the rate equation of a chemical reaction. It relates the rate of the reaction to the concentrations of the reactants.

### Step 2: Identify Factors Affecting the Rate Constant
The rate constant is influenced by several factors, but the most significant one is temperature.

### Step 3: Analyze the Effect of Temperature
As temperature increases, the kinetic energy of the molecules increases, leading to more frequent and effective collisions between reactant molecules. This generally increases the rate constant.

### Step 4: Consider Other Factors
While other factors such as pressure, concentration, and extent of reaction can affect the rate of reaction, they do not affect the rate constant itself. The rate constant remains constant for a given reaction at a specific temperature.

### Step 5: Conclusion
Thus, the rate constant depends solely on temperature.

### Final Answer
The rate constant depends only on temperature.

---