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JEE Main 2025 Jan 24 Shift 2, Chemistry Q9: Law of Chemical Equilibrium And Equilibrium Constant

JEE Main2025Jan 24, Shift 2Chemistry
Q.

For the reaction,

Attainment of equilibrium is predicted correctly by:

  1. A
  2. B
  3. C
  4. D
Solution

Starting with only reactants:

As the forward reaction proceeds, and both fall (in equal amounts, since 1 mole of each is consumed for every 2 moles of HI formed), while rises from zero. Once equilibrium is reached, all three concentrations become constant.

The graph in option (2) matches all three features: equal and decreasing and , increasing from zero, and all curves plateauing.

Correct option: (2)

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