The equilibrium constant Kc for the reaction SO₂ (g) + NO₂ (g) ⇄ SO₃(g) + NO (g ) is 16. If one mole each of all four gases is taken in 1 dm³ vessel, the equilibrium concentration of NO would be

4.5 g of PCl₅ was completely vaporized at 523 K and the vapour occupied 1.7 L at 1 atm pressure , the Kp for the reaction PCl₃(g) + Cl₂(g)  ⇄ PCl₅ (g)

For the given reaction 2A(s) + B(g) ⇄ C(g) + E(s)   the degree of dissociation of B was found to be 20% at 300K and 24% at 500K, the rate of backward reaction.

For the given equilibrium L(g) ⇄ M(g). The Kf = 5×10^-4 mole per Litre per second and Kb = 3 x 10^-2 Litre per mole per seconds, the equilibrium concentration of M is.

When a mixture on N₂ and H₂ in the volume ratio of 1:5 is allowed to react at 100K and 10³ atm pressure, 0.426 mole fraction of NH₃ is formed at equilibrium . The Kp for the reaction is

a) 2.8 x 10^-4           b) 6.6 x 10^-4        c) 3.0 x 10^-4         d) 6 x 10^-4

For the reaction CO₂(g) + H₂(g) ⇄ CO (g) + H₂O(g) The Kp for the reaction is 0.11. If the reaction was started with 0.45 mole of CO₂ and 0.45 mole of H₂ at 700 K the concentration of CO₂  when 0.34 mole of CO₂ and 0.34 mole of H₂ are added when the first equilibrium attained is

For the chemical reaction 3A(g) + 4B ⇄ 5C The amount of C at equilibrium will be affected with

0.96 g of HI was heated to 720 K till the equilibrium. It was then cooled quickly, the % dissociation of HI was found to be 21%. The volume of Hypo required for the liberated I₂ is

The equilibrium constant for the reaction H₂ (g) + I₂ (g) ⇄ 2HI(g)    at 500^oC  is 50. The number of moles of H₂ per mole of I₂ required to convert 90% of the I₂ into HI are

At 200^oC PCl₅ dissociates as follows PCl₅ (g) ⇄ Cl₂ (g) + PCl₃ (g) It was found that the equilibrium vapors are 63 times as heavy as H₂. The degree of dissociation of PCl₅ is

For the reaction A + B ⇄ C + D, equilibrium concentrations of [C] = [D] = 0.5M if we start with 1 mole each of A and B. Percentage of A converted into C if we start with 2 moles of A and 1 mole of B is

CH₃ – CO – CH_3(g) ⇄ CH₃ – CH_3(g) + CO_(g)

Initial pressure of CH₃COCH₃ is 100 mm when equilibrium is set up, mole fraction of CO_(g) is 1/3 hence K_p is

For the reaction CaCO₃ (s) ⇄ CaO (s) + CO₂ (g); equilibrium constant K_p is 1.642 atm at 1000 K, if 40 gm of CaCO₃ was put into a 10 L flask, percentage of calcium carbonate would remain unreacted at the equilibrium is

If equilibrium constant of CH₃COOH + H₂O ⇄ CH₃COO^– + H₃O⁺ is 1.8 x 10^-5, equilibrium constant for CH₃COOH + OH^– → CH₃COO^–  + H₂O is

a) 1.8 x 10^-9                    b) 1.8 x 10⁹                  

c) 5.55 x 10^-10                d) 5.55 x 10¹⁰

PCl₅ is 40% dissociated when pressure is 2 atmospheres, it will be 80% dissociated when pressure is approximately