Question:

\( 2HI(g) \rightleftharpoons H_{2}(g) + I_{2}(g) \). The equilibrium constant of the above reaction is 6.4 at 300 K. If 0.25 mole each of \( H_{2} \) and \( I_{2} \) are added to the system, the equilibrium constant will be

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Equilibrium constant changes only with temperature.
Updated On: Apr 10, 2026
  • 6.4
  • 0.8
  • 3.2
  • 1.6
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The Correct Option is A

Solution and Explanation

Step 1: Property of K
The equilibrium constant ($K$) is a characteristic constant for a given reaction.
Step 2: Dependency

$K$ depends only on the temperature for a specific chemical equation.
Step 3: Conclusion

Adding more reactants or products changes the equilibrium position but does not change the value of the equilibrium constant itself. It remains 6.4.
Final Answer: (a)
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