21. Which statement best describes a dynamic chemical equilibrium? (A) when the

Question

21. Which statement best describes a dynamic chemical equilibrium? (A) when the forward and reverse reaction rates are equal (B) when the forward and reverse reaction rates are zero (C) when the forward reaction rate is zero (D) when the reverse reaction rate is zero 22. What is the equilibrium constant expression for NCI, [HCI [NH, J[CI,] (A) K,= NCI, ][HCI (C) Ke= (D) = [NH,] 23. A 1.00 L flask contains 0.10 mol of C, 0.20 mol of CO. and 0.30 mol of CO at equilibrium. What is the value of the equilibrium constant (K) for the reaction below? (A) 45 (B) 22 (C15 (D) 0.45 Given the equilibria: 24. PbF,(s) Pb -(aq) + 2P(H) What is the equilibrium constant for the equilibria? 25. Ata specific temperature, the equilibriu constant for the reaction is 36. What is the value of the equilibrium constant for the reaction? (A) 0.056 (B) 0.17 ( 60 (D) 18 26. For the interhalogenic equilibrium: At a given temperature - 7.7. Ifa 1.0L vessel initially contains 1.0 atm of BrCIg), what will the partial pressure of Cl2(g) be at llrum? (A) 0.10 atm (C) 0.42 atm (B) 0.21 atm (D) 058 atm

Explanation / Answer

21)

In dynamic chemical equilibrium, there is no net reaction taking place but both forward and backward reaction takes place such that rate of forward reaction is equal to rate of backward reaction

Answer: A

22)

Kc is defined as concentration of product by concentration of reactant with each concentration term raised to power that is equal to its stoichiometric coefficient in balanced equation

this is shown by option C

Answer: C

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