A : Increasing the concentration of `H_2` will increases
magnitude of equilibrium constant of the reaction
`H_2 +I_2 hArr 2HI`
R: Value of `K_c` depends upon the concentration of reactants and products taken.

Options

A. If both Assertion & Reason are true and the reason in the corret explanation of the assertion, then mark
B. If both assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark
C. If Assertion is true statement but Reason is false then mark
D. If both Assertion and Reason are false statements , then mark

Answer

To solve the question, we need to analyze both the assertion (A) and the reason (R) provided in the context of the equilibrium constant (Kc) for the reaction:

\[ H_2 + I_2 \rightleftharpoons 2HI \]

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that increasing the concentration of \( H_2 \) will increase the magnitude of the equilibrium constant \( K_c \).
- The equilibrium constant \( K_c \) for the reaction is given by the formula:
\[ K_c = \frac{[HI]^2}{[H_2][I_2]} \]
- Here, \( [HI] \), \( [H_2] \), and \( [I_2] \) represent the molar concentrations of the respective substances at equilibrium.

2. **Analyzing the Effect of Concentration on \( K_c \)**:
- According to Le Chatelier's principle, if the concentration of a reactant (in this case, \( H_2 \)) is increased, the system will shift to the right to counteract the change, producing more products (HI).
- However, this does not affect the value of \( K_c \) itself; it only affects the concentrations of the reactants and products until a new equilibrium is established.

3. **Conclusion about the Assertion**:
- The assertion is **false** because increasing the concentration of \( H_2 \) does not increase the magnitude of \( K_c \); it only shifts the equilibrium position.

4. **Understanding the Reason (R)**:
- The reason states that the value of \( K_c \) depends upon the concentration of reactants and products taken.
- This statement is also **false** because the equilibrium constant \( K_c \) is a fixed value at a given temperature and does not depend on the concentrations of reactants and products. It is determined solely by the nature of the reaction and the temperature.

5. **Final Conclusion**:
- Since both the assertion and the reason are false, the correct answer to the question is that both A and R are false.

### Final Answer:
Both assertion (A) and reason (R) are false.