Equilibrium Basics: JEE Questions & Solutions
22 previous-year JEE Chemistry questions on Equilibrium Basics, each with a worked step-by-step solution.
Previous-year questions
- 01
Consider the general reaction given below at 400 K: xA(g) ⇌ yB(g). The values of K_p and K_c are studied under the same condition of…
MCQMediumJEE 2026 - 02
For 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…
NVAMediumJEE 2026 - 03
X₂(g) + Y₂(g) ⇌ 2Z(g). Equilibrium moles of X₂, Y₂, Z are 3, 3, 9 mol (in 1 L). 10 mol of Z(g) is added. New equilibrium moles of Z(g) is.…
NVAMediumJEE 2026 - 04
Consider the following gaseous equilibrium in a closed container of volume V at temperature T: P₂(g) + Q₂(g) ⇌ 2PQ(g) Initially, 2 moles…
MCQMediumJEE 2026 - 05
Observe the following equilibrium in a 1 L flask: A(g) <=> B(g) At T(K), the equilibrium concentrations of A and B are 0.5 M and 0.375 M…
MCQEasyJEE 2026 - 06
A vessel at 1000 K contains CO₂ with a pressure of 0.5 atm. Some of CO₂ is converted into CO on addition of graphite. If total pressure at…
MCQMediumJEE 2025 - 07
Consider the reaction: X₂Y(g) ⇌ X₂(g) + 1/2 Y₂(g) The equation representing the correct relationship between the degree of dissociation x…
MCQMediumJEE 2025 - 08
37.8 g N₂O₅ was taken in a 1 L reaction vessel and allowed to undergo the following reaction at 500 K: 2N₂O₅(g) → 2N₂O₄(g) + O₂(g) The…
NVAMediumJEE 2025 - 09
For the reaction, H₂(g) + I₂(g) ⇌ 2HI(g) Attainment of equilibrium is predicted correctly by:
MCQEasyJEE 2025 - 10
At temperature T, compound AB₂ dissociates as AB_2(g) ⇌ AB_(g) + 1/2 B_2(g), having degree of dissociation x (small compared to unity). The…
MCQMediumJEE 2025 - 11
Consider the following equilibrium, CO(g) + 2H₂(g) ⇌ CH₃OH(g) 0.1 mol of CO along with a catalyst is present in a 2 dm³ flask maintained at…
NVAMediumJEE 2025 - 12
Given below are two statements: Statement I: A catalyst cannot alter the equilibrium constant K_c of the reaction, temperature remaining…
MCQEasyJEE 2025 - 13
The 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…
NVAMediumJEE 2025 - 14
The equilibrium constant for the formation of NH₃ from N₂ and H₂, given [N₂] = 2×10⁻² M, [H₂] = 3×10⁻² M, [NH₃] = 1.5×10⁻² M at 500 K, is:
MCQEasyJEE 2024 - 15
For the given reaction, choose the correct expression of K_C from the following: Fe³⁺_(aq) + SCN⁻_(aq) ⇌ (FeSCN)²⁺_(aq)
MCQEasyJEE 2024 - 16
Water decomposes at 2300 K: H₂O(g) ⇌ H₂(g) + 1/2 O₂(g) The percent of water decomposing at 2300 K and 1 bar is (Nearest integer).…
NVAMediumJEE 2023 - 17
At 298 K: N₂ + 3H₂ ⇌ 2NH₃, K₁ = 4 × 10⁵ N₂ + O₂ ⇌ 2NO, K₂ = 1.6 × 10¹² H₂ + 1/2O₂ ⇌ H₂O, K₃ = 1.0 × 10⁻¹³ Based on the above equilibria,…
NVAMediumJEE 2023 - 18
For reaction: SO₂(g) + 1/2 O₂(g) ⇌ SO₃(g) K_p = 2 × 10¹² at 27^° C and 1 atm pressure. The K_c for the same reaction is (Nearest integer).…
NVAEasyJEE 2023 - 19
(i) X(g) ⇌ Y(g) + Z(g), K_p1 = 3 (ii) A(g) ⇌ 2B(g), K_p2 = 1 If the degree of dissociation and initial concentration of both the reactants…
NVAMediumJEE 2023 - 20
The number of correct statement(s) involving equilibria in physical form from the following is: (1) Equilibrium is possible only in a…
NVAEasyJEE 2023 - 21
A mixture of 1 mole of H₂O and 1 mole of CO is taken in a 10 litre container and heated to 725 K. At equilibrium, 40% of water by mass…
MCQMediumJEE 2023 - 22
4.5 moles each of hydrogen and iodine is heated in a sealed ten litre vessel. At equilibrium, 3 moles of HI were found. The equilibrium…
NVAEasyJEE 2023
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