Equilibrium Tes...

Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE option is correct.

Q. Vapour pressure of NH₄HS (s)is 20 mm at 25°C, for

NH₄HS (s)⇌ NH₃(g) + NH₃(g) + H₂S(g)
Total pressure when NH₄HS (s) dissociates at 25°Cin a vessel which already contains H₂S (g)at a pressure of 15 mm, is

Once the equilibrium is reached under given condition:

Ca(HCO₃)₂ is strongly heated and after equilibrium is attained, temperature changed to 25° C.

Ca(HCO₃)₂(s)⇌CaO(s) + 2CO₂ (g) + H₂O(g)
K_p = 36 (pressure taken in atm)
Thus, pressure set up due to CO₂ is

Na₂SO₄.10H₂O dehydrates according to the equation,

Na₂SO₄· 10H₂O (s)⇌ Na₂sO₄(s) + 10 H₂O(g)     

; K_p = 2.56 x 10^-20 

What is the pressure of water vapor at equilibrium with a mixture of Na₂SO₄· 10H₂O and Na₂sO₄

Ca(HCO₃)₂ decomposes as,

Ca (HCO₃)₂(s) ⇌ CaCO₃(s) + H₂O(g) + CO₂(g)
Equilibrium pressure is found to be 0.12 bar. What is pco₂ if the reaction mixture also contains H₂O(g)at 0.20 bar?

For the following equilibrium,

Assume following equilibria when total pressure set up in each are equal to 1 atm, and equilibrium constant (K_p) as K₁; K₂ and K₃


Thus,

For the equilibrium,

at 1000 K. If at equilibrium p_CO = 10 then total pressure at equilibrium is 

Ammonium carbamate dissociates as,

In a closed vessel containing ammonium carbamate in equilibrium with its vapour, ammonia is added such that partial pressure of NH₃ now equals the original total pressure. Thus, ratio of the total pressure to the original pressure is

Kc forthe decomposition of NH₄HS(s) is 1.8x 10^-4 at 25°C.

If the system already contains [NH₃] = 0.020 M, then when equilibrium is reached, molar concentration are

Direction Choice the correct combination of elements and column I and coloumn II  are given as option (a), (b), (c) and (d), out of which ONE option is correct.

Q. Given at 298 K

Solid ammonium carbonate (NH₂CO₂NH₄) dissociates completely into ammonia and carbon dioxide when it evaporates :

At 298 K, the total pressure of the gases in equilibrium with the solid is 0.116 atm. Derive the value of equilibrium constant K_p.

At 90° C , the following equilibrium is established :

If 0.20 mole of hydrogen and 1.0 mole of sulphur are heated to 90°C in a 1.0 dm³ flask, what will be the partial pressure of H₂S gas at equilibrium?

Graphite is added to a vessel that contains CO₂(g) at a pressure of 0.830 atm at a certain high temperature. The pressure rises due to a reaction that produces CO (g). The total pressure reaches an equilibrium value of 1.366 atm. Calculate the equilibrium constant of the following reaction.

For the equilibrium,

K_p = 0.166 at 1000 K. Exactly 10.0 g of CaCO₃ is placed in a 10.0 L flask at 1000 K. After equilibrium is reached, what mass of CaCO₃ remains?

Equilibrium constant for the reaction PCL₅⇋PCL₃+CL₂ is 0.0205 at 230°C and 1 atmospheric pressure if at equilibrium concentration of PCL₅ is 0.235 moles liter−1liter-1and that of CL₂= 0.028 moleslit−1lit-1 then conc. of PCL₃ at equilibrium is