Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
99 Percentile Qs Bank for JEE MainChemistryChemical Equilibrium

When N 2 O 5 is heated at certain temperature, it dissociates as N 2 O 5 g ⇌ N 2 O 3 g + O 2 g , K c = 2.5 at the same time N 2 O 3 also decomposes as N 2 O 3 g ⇌ N 2 O g + O 2 g In initially 4 mol of N 2 O 5 are taken in 1 L flask and allowed to dissociate, concentration of O 2 at equilibrium is 2.5 M, equilibrium concentration of N 2 O 3 will be

Options

  1. A1.2
  2. B2.15
  3. C1.5
  4. D1.8

Correct answer

D. 1.8

Step-by-step solution

Solution writing equilibrium concentrations of simultaneous equilibria (V=1 Litre) N 2 O 5 4 - x ⇌ N 2 O 3 g x - y + O 2 g x + y ; K c = 2.5 N 2 O 3 x - y ⇌ N 2 O y + O 2 x + y O 2 = x + y = 2.5 K c = 2.5 = N 2 O 3 O 2 N 2 O 5 = x - y x + y 4 - x as y = 2.5 - x ; Substituting ( x - 2.5 + x ) 2.5 4 - x = 2.5 2 x - 2.5 = 4 - x ∴ 3 x = 6.5 ∴ x = 2.17 y = 0.33 N 2 O 3 = x - y = 2.17 - 0.33 x - y = 1.84 = N 2 O 3 Choice 1.8

Practice Chemical Equilibrium on Quantrex Academy →

More from Chemical Equilibrium

Consider the following reactions in which all the reactants and products are present in gaseous state 2xy x₂ + y₂ K₁ = 2.5 10^5 xy + 1 2 z₂ xyz K₂ = 5 10⁻³ The value of K₃ for the 2026Solid carbon, CaO and CaCO₃ are mixed and allowed to attain equilibrium at T K. CaCO ₃(s) CaO (s) + CO ₂(g) K_ p₁ = 0.08 atm C (s) + CO ₂(g) 2 CO (g) K_ p₂ = 2 atm The partial pres 2026In a closed flask at 600 K, one mole of X₂ Y₄ (g) attains equilibrium as given below : X ₂ Y ₄(g) 2 XY ₂(g) At equilibrium, 75 % X₂ Y₄ (g) was dissociated and the total pressure is 2026One mole each of He and A(g) are taken in a 10 L closed flask and heated to 400 K to establish the following equilibrium. A(g) B(g) . K_c for this reaction at 400 K is 4.0 . The pa 2026The reaction A(g) B(g) + C(g) was initiated with the amount ' a ' of A(g) . At equilibrium it is found that the amount of A(g) remaining is (a - x) at a total pressure of p . The e 2026The values of pressure equilibrium constant recorded at different temperatures for the following equilibrium reaction have been given below A(g) B(g) + C(g) 1 T ( K ⁻¹) ₁₀ K_p 0.05 2026For the following reaction at 50° C and at 2 atm pressure, 2N₂O₅(g) 2N₂O₄(g)+O₂(g) N₂O₅ is 50 % dissociated. The magnitude of standard free energy change at this temperature is x . 2026At T(K) , the equilibrium constant of A₂(g) + B₂(g) C(g) is 2.7 10⁻⁵ . What is the equilibrium constant for 1 3 A₂(g) + 1 3 B₂(g) 1 3 C(g) at the same temperature? 2026 Full Chemical Equilibrium list All 99 Percentile Qs Bank for JEE Main PYQs