The equilibrium constant K for the reaction `2HI(g) hArr H_(2)(g)+I_(2)(g)` at room temperature is `2.85` and that at `698 K` is `1.4 xx10^(-2)`. This implies

Options

A. `HI` is exothermic compound
B. `HI` is very stabel at room temperature
C. `HI` is realtively less stable than `H_(2)` and `I_(2)`
D. `HI` is resonance stabilised

Explanation

`K_(c)` decreases with temperature i.e., reaction is exothermic or energy of `HI` is more than `H_(2)` and `I_(2)` or `HI` is less stabel than `H_(2)`, `I_(2)`.