Chemical Equilibrium: JEE Main Chemistry Previous Year Questions

138 previous year questions from Chemical Equilibrium. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. $In which one of the following equilibria, K_{p} \neq = K_{c} ?$
2. $A vessel at 1000 K contains CO_{2} with a pressure of 0.5 atm. Some of CO_{2} is converted into CO on addition of graphite. If total pressure at e\dots$
3. $H_{2} S is passed into one dm^{3} of a solution containing 0.1 mole of Zn^{2 +} and 0.01 mole of Cu^{2 +} till the sulphide i\dots$
4. $The gas phase reaction 2 N O_{2} (g) ® N_{2} O_{4} (g) is an exothermic reaction. The decomposition of N_{2} O_{4}, in equilibrium mixture of N O_{2} (g) and N_{2} O_{4} \dots$
5. $2 HI_{(g)} ⇌ H_{2 (g)} + I_{2 (g)} The equilibrium constant of the above reaction is 6.4 at 300 K \dots$
6. $Consider the reaction X_{2} Y (g) = X_{2} (g) + \frac{1}{2} Y_{2} (g) The equation representing correct relationship between the\dots$
7. $The pH of 10^{- 8} MHCl solution is$
8. $Which of the following salts on being dissolved in water gives pH > 7 at 25^{\circ} C ?$
9. $In the reaction,\dots$
10. $Consider the reaction N_{2} O_{4} (g) ⇌ 2 N O_{2} (g) . The temperature at which K_{C} = 20.4 and K_{p} = 600.1, is _____ K. (R\dots$
11. $The equilibrium constant for the reaction, N_{2 (g)} + O_{2 (g)} ⇌ 2 NO_{(g)} is 4 \times 10^{- 4} at\dots$
12. $5.1 g NH_{4} SH is introduced in 3.0 L evacuated flask at 327° C, 30 % of the solid NH_{4} SH decomposed to\dots$
13. $Solubility of AgCl is least in$
14. $The equilibrium constant for the reaction\dots$
15. $In the following system, PCl_{5} (g) ⇋ PCl_{3} (g) + Cl_{2} (g) at equilibrium, upon addition of x\dots$
16. $On adding which of the following, the pH of 20 mL of 0.1 NHCl will not alter?$
17. $Two solids dissociate as follows A (s) \to B (g) + C (g); K_{P_{1}} = x atm^{2} \dots$
18. $Consider the following chemical equilibrium of the gas phase reaction at a constant temperature: A (g) ⇌ B (g) + C (g) If p being t\dots$
19. $A_{(g)} ⇌ B_{(g)} + \frac{C}{2} (g) The correct relationship between K_{P}, α and equilibrium pressure\dots$
20. $For the following reactions, equilibrium constants are given:\dots$
21. $The conjugate base of NH_{3} is$
22. $For the reaction, H_{2} (g) + I_{2} (g) ⇌ 2 HI (g) Attainment of equillibrium is predicted correctly by :$
23. $When two reactants, A & B are mixed to give products C & D, the reaction quotient Q, at the initial stages of the reaction.$
24. $Which one of the following condition will increase the voltage of the cell represented by the equation :\dots$
25. $30 cc of \frac{M}{3} HCl, 20 cc of \frac{M}{2} HNO_{3} and 40 cc of \frac{M}{4} NaOH solutions are mixed and th\dots$

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Chemical Equilibrium: JEE Main Chemistry Previous Year Questions

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