1.
For the reaction 2HI(g)H2(g)+I2(g)\mathrm{2HI(g) \rightleftharpoons H_2(g) + I_2(g)}. The value of K is 4. If 2 mol of H2_2, 2 mol of I2_2 and 2 mol of HI are present in one litre container then moles of I2_2 present at equilibrium is: