JEE Main Chemistry question

The equilibrium constant K for the reaction 2HI(g)⇌H₂(g)+I₂(g) at room temperature 300 K is 2.85 and at 698 K 1.84×10⁻². Hence the reason that HI exists as a stable compound at room temperature is because:

(A)It decomposes so slowly that equilibrium is not readily achievedCorrect
(B)The HI bond has a large covalent contribution
(C)The heat of reaction at room temperature is −5.31 kcal
(D)It is uncatalytic reaction

Answer: (A)

Solution

The given K values show that the equilibrium position of is temperature-dependent, yet HI is observed to be perfectly stable in a sealed container at room temperature. This is because the equilibrium constant only describes the thermodynamically favoured

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Question ID VK-136130