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• EquilibriumJEE Main 2026, 6 Apr Evening shift…k electrolyte A x B y of concentration 'c' and dissociation constant 'K'. The degree of dissociation is given by:
• EquilibriumJEE Main 2026, 2 Apr Evening shiftThe first and second ionization constants of a weak dibasic acid H₂A are 8.1×10⁻⁸ and 1.0×10⁻¹³ respectively. 0.1 mol of H₂A was dissolved in 1L of 0.1 M HCl solution. The concentration of HA⁻ⁱn the resultant solution is…
• EquilibriumJEE Main 2026, 4 Apr Morning shiftAt T(K), the equilibrium constant of A₂(g)+B₂(g) C(g) is 2.7×10⁻⁵. What is the equilibrium constant for 1/3A₂(g)+1/3B₂(g) 1/3C(g) at the same temperature?
• EquilibriumJEE Main 2026, 5 Apr Morning shiftThe values of pressure equilibrium constant recorded at different temperatures for the following equilibrium reaction have been given below A(g) B(g) + C(g): for 1/T (K ⁻¹) = 0.05, 0.06, 0.07, log ₁₀K p = 3.5, 2.5, 1.5 r…
• EquilibriumJEE Main 2026, 5 Apr Evening shiftThe 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 equilibrium constant Kp of the reaction can be ca…
• EquilibriumJEE Main 2025, 23 Jan Morning shiftIf 1 mM solution of ethylamine produces pH = 9, then the ionization constant (K b) of ethylamine is 10⁻ˣ. The value of x is _ _ (nearest integer). [The degree of ionization of ethylamine can be neglected with respect to …
• EquilibriumJEE Main 2025, 23 Jan Evening shift…p between the degree of dissociation (x) of X₂Y(g) with its equilibrium constant Kp is _ _ _. Assume x to be very very small.
• EquilibriumJEE Main 2025, 29 Jan Evening shiftConsider the equilibrium CO(g) + 3H₂(g) CH₄(g) + H₂O(g). If the pressure applied over the system increases by two fold at constant temperature then (A) Concentration of reactants and products increases. (B) Equilibrium w…
• EquilibriumJEE Main 2025, 2 Apr Evening shiftConsider the following chemical equilibrium of the gas phase reaction at a constant temperature: A(g) B(g) + C(g) If p being the total pressure, K p is the pressure equilibrium constant and α is the degree of dissociatio…
• EquilibriumJEE Main 2025, 3 Apr Morning shiftGiven below are two statements: Statement I: A catalyst cannot alter the equilibrium constant (K c) of the reaction, temperature remaining constant. Statement II: A homogenous catalyst can change the equilibrium composit…
• EquilibriumJEE Main 2025, 8 Apr Evening shiftThe equilibrium constant for decomposition of H₂O(g), H₂O(g) H₂(g) + 1/2 O₂(g) (Δ G° = 92.34 kJ mol ⁻¹), is 8.0×10⁻³ at 2300 K and total pressure at equilibrium is 1 bar. Under this condition, the degree of dissociation …
• EquilibriumJEE Main 2026, 21 Jan Evening shiftThe first and second ionization constants of H₂X are 2.5×10⁻⁸ and 1.0×10⁻¹³ respectively. The concentration of X²⁻ in 0.1 M H₂X solution is _ _ _ ×10⁻¹⁵ M. (Nearest Integer)
• EquilibriumJEE Main 2026, 23 Jan Morning shiftFor the following gas phase equilibrium reaction at constant temperature, NH₃(g) 1/2N₂(g)+3/2H₂(g) if the total pressure is 3 atm and the pressure equilibrium constant (K p) is 9 atm, then the degree of dissociation is g…
• Chemical ThermodynamicsJEE Main 2026, 28 Jan Evening shift… line. The intercept and slope respectively are (where K is equilibrium constant).
• EquilibriumJEE Main 2004, Annual Paper 1The equilibrium constant for the reaction N₂(g) + O₂(g) 2NO(g) at temperature T is 4 × 10⁻⁴. The value of K c for the reaction NO(g) 1 2 N₂ (g) + 1 2 O₂ (g) at the same temperature is:
• EquilibriumJEE Main 2005, Annual Paper 1…gases in the flask. When the decomposition reaction reaches equilibrium, the total pressure in the flask rises to 0.84 atm. The equilibrium constant for NH₄HS decomposition at this temperature is:
• EquilibriumJEE Main 2006, Annual Paper 1The equilibrium constant for the reaction SO₃ (g) SO₂ (g) + 1 2 O₂ (g) is K c = 4.9 × 10^–2. The value of K c for the reaction 2SO₂ (g) + O₂ (g) 2SO₃ (g) will be:
• EquilibriumJEE Main 2008, Annual Paper 1The equilibrium constants K P 1 and K P 2 for the reactions X 2Y and Z P + Q, respectively are in the ratio of 1: 9. If the degree of dissociation of X and Z be equal then the ratio of total pressure at these equilibria …
• EquilibriumJEE Main 2008, Annual Paper 1For the following three reactions a, b and c, equilibrium constants are given: a. CO (g) + H₂O (g) CO₂(g) + H₂ (g); K₁ b. CH₄ (g) + H₂O (g) CO(g) + 3H₂ (g); K₂ c. CH₄ (g) + 2H₂O (g) CO₂(g) + 4H₂ (g); K₃
• EquilibriumJEE Main 2010, Annual Paper 1In aqueous solution the ionization constants for carbonic acid are K₁ = 4.2 x 10^–7 and K₂ = 4.8 x 10^–11 Select the correct statement for a saturated 0.034 M solution of the carbonic acid.
• EquilibriumJEE Main 2012, Annual Paper 1The equilibrium constant (K C) for the reaction N₂(g) + O₂(g) → 2NO(g) at temperature T is 4 × 10^–4. The value of K C for the reaction, NO(g) → 1/2N₂(g) + 1/2O₂(g) at the same temperature is:
• EquilibriumJEE Main 2016, Session Shift 1The equilibrium constant at 298 K for a reaction A + B C + D is 100. If the initial concentration of all the four species were 1M each, then equilibrium concentration of D (in mol L^–1) will be:
• EquilibriumJEE Main 2018, 15 Apr Evening shift…rbon monoxide and 3 moles of chlorine were allowed to reach equilibrium according to the reaction, CO + Cl₂ COCl₂ At equilibrium, if one mole of CO is present then equilibrium constant (K c) for the reaction is:
• EquilibriumJEE Main 2019, 8 Apr Evening shiftFor the following reactions, equilibrium constants are given: S(s) + O₂(g) ⇋ SO₂(g); K₁ = 10⁵² 2S(s) + 3O₂(g) ⇋ 2SO₃(g); K₂ = 10¹²⁹ The equilibrium constant for the reaction, 2SO₂(g) + O₂(g) ⇋ 2SO₃(g) is:
• EquilibriumJEE Main 2019, 11 Jan Morning shiftConsider the reaction N₂(g) + 3H₂(g) 2NH₃(g) The equilibrium constant of the above reaction is K p. If pure ammonia is left to dissociate, the partial pressure of ammonia at equilibrium is given by (Assume that PNH₃ << P…
• EquilibriumJEE Main 2020, 6 Sep Morning shiftThe variation of equilibrium constant with temperature is given below: Temperature Equilibrium Constant T₁ = 25^(o)C K₁ = 10 T₂ = 100^(o)C K₂ = 100 The values of Δ H^(o), Δ G^(o) at T₁ and Δ G^(o) at T₂ (in kJ mol^–1) re…
• EquilibriumJEE Main 2020, 5 Sep Morning shift…h of the following cases (a, b), the direction in which the equilibrium shifts is: (a) Temperature is decreased. (b) Pressure is increased by adding N₂ at constant T.
• EquilibriumJEE Main 2020, 4 Sep Evening shiftIf the equilibrium constant for A ⇌ B + C is K eq ^((1)) and that of B + C ⇌ P is K eq ^((2)), the equilibrium constant for A ⇌ P is:
• EquilibriumJEE Main 2022, 24 Jun Morning shiftFor a reaction at equilibrium A(g) B(g) + 1/2 C(g) the relation between dissociation constant (K), degree of dissociation (α) and equilibrium pressure (p) is given by:
• EquilibriumJEE Main 2022, 30 Jun Morning shiftThe equilibrium constant for the reversible reaction 2A(g) 2B(g) + C(g) is K₁ 3/2 A(g) 3/2 B(g) + 3/4 C(g) is K₂. K₁ and K₂ are related as:
• EquilibriumJEE Main 2023, 6 Apr Morning shiftFor a concentrated solution of a weak electrolyte (K eq = equilibrium constant) A₂ B₃ of concentration ' c ', the degree of dissociation ' α ' is:
• EquilibriumJEE Main 2024, 4 Apr Evening shiftThe equilibrium constant for the reaction SO₃(~g) SO₂(~g)+1/2 O₂(~g) is K c =4.9 × 10⁻². The value of K c for the reaction given below is 2 SO₂(~g)+O₂(~g) 2 SO₃(~g) is:
• EquilibriumJEE Main 2024, 8 Apr Morning shiftFor the given hypothetical reactions, the equilibrium constants are as follows: X Y; K₁=1.0 Y Z; K₂=2.0 Z W; K₃=4.0 The equilibrium constant for the reaction X W is
• Redox Reactions and ElectrochemistryJEE Main 2003, Annual Paper 1…d e.m.f. of the cell is found to be 0.295 V at 25^(o)C. The equilibrium constant of the reaction at 25^(o)C will be
• Redox Reactions and ElectrochemistryJEE Main 2004, Annual Paper 1… one electron change is found to be 0.591 V at 25^(o)C. The equilibrium constant of the reaction is (F = 96,500 C mol⁻¹: R = 8.314 JK⁻¹ mol⁻¹)
• Redox Reactions and ElectrochemistryJEE Main 2005, Annual Paper 1For a spontaneous reaction the ∆G, equilibrium constant (K) and E cell ^(o) will be respectively
• Redox Reactions and ElectrochemistryJEE Main 2019, 9 Jan Evening shiftIf the standard electrode potential for a cell is 2 V at 300 K, the equilibrium constant (K) for the reaction Zn(s) + Cu²⁺ (aq) Zn²⁺(aq) + Cu(s) at 300 K is approximately, (R = 8 JK⁻¹mol⁻¹, F = 96000 C mol⁻¹)
• Redox Reactions and ElectrochemistryJEE Main 2019, 11 Jan Evening shiftGiven the equilibrium constant: K C of the reaction: Cu(s) + 2Ag⁺ (aq) → Cu²⁺ (aq) + 2Ag(s) is 10 × 10¹⁵, calculate the E cell ⁰ of this reaciton at 298 K [2.303 RT/F at 298 K = 0.059V]
• EquilibriumJEE Main 2007, Annual Paper 1The first and second dissociation constants of an acid H₂A are 1.0 × 10^−5 and 5.0 × 10^−10 respectively. The overall dissociation constant of the acid will be:
• EquilibriumJEE Main 2022, 25 Jul Evening shiftK a₁, K a₂ and K a₃ are the respective ionization constants for the following reactions (a), (b) and (c). (a) H₂C₂O₄.3ex → _ to.5ex H⁺ + H C₂ O₄^ - (b) H C₂ O₄^ -.3ex → _ to.5ex H⁺ + C₂O₄²⁻ (c) H₂C₂O₄.3ex → _ to.5ex 2H⁺ …

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