16- The value of $$ K $$ at rate rule of reaction :- $$ \begin{array}{ll} ext { a-will be constant } & ext { b-will be changed by changing the temperature } \ ext { c-changes by changing the time } & d ext { - if concentration changes } K ext { will change. }\end{array} $$

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16- The value of $$ K $$ at rate rule of reaction :- $$ \begin{array}{ll}	ext { a-will be constant } & 	ext { b-will be changed by changing the temperature } \ 	ext { c-changes by changing the time } & d 	ext { - if concentration changes } K 	ext { will change. }\end{array} $$

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The value of $$ K $$ in the context of reaction rate rules typically refers to the **rate constant**. Understanding how the rate constant behaves under different conditions is crucial in chemical kinetics.

**Rate Constant ($$ K $$) Dependence:**
- **Temperature:** The rate constant $$ K $$ is **highly dependent on temperature**. According to the **Arrhenius equation**, an increase in temperature generally increases the rate constant, leading to a faster reaction rate. Conversely, lowering the temperature decreases $$ K $$.

- **Concentration:** The rate constant $$ K $$ is **independent of the concentrations** of reactants and products. It is a proportionality factor that relates the reaction rate to the concentrations of reactants.

- **Time:** The rate constant $$ K $$ **does not change with time**. It remains constant for a given reaction under constant temperature conditions.

**Analyzing the Options:**
- **a. Will be constant:** This is **incorrect** because $$ K $$ changes with temperature.
- **b. Will be changed by changing the temperature:** **Correct.** Temperature directly affects the rate constant.
- **c. Changes by changing the time:** **Incorrect.** $$ K $$ does not depend on time.
- **d. If concentration changes, $$ K $$ will change:** **Incorrect.** $$ K $$ is independent of concentration changes.

**Conclusion:**
The correct statement regarding the rate constant $$ K $$ is:

**Answer:**  
**b – K will be changed by changing the temperature**
$$ K $$ changes when the temperature changes.

16- The value of at rate rule of reaction :-

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