CHAPTER NO.7 CHEMICAL EQUILIBRIUM

CHAPTER NO.7 CHEMICAL EQUILIBRIUM

1.	Mathematical representation of law of mass action a. Kc=([C]2[D]2)/([A]2[B]2) b. ([C]2[D]2)([A]2[B]2) c. [C]2[D]2) d. Non of these	A
2.	The relationship between Kp and Kc is a. Kp = Kc (RT) 1/ Δn b. Kp = Kc (RT)Δn c. Kp = Kc /(RT)Δn d. Non of these	B
3.	The relationship between Kp and Kx is a. Kp = Kx (P)Δn b. Kp = Kx (P)/Δn c. Kp = Kx /(P)Δn d. Kp = Kx (P)1/Δn	A
4.	The relationship between Kp and Kn is                 a. Kp = Kn (P/N)/Δn b. Kp = Kn /(P/N)Δn c. Kp = Kn (P/N)1/Δn d. Kp = Kn (P/N)Δn	D
5.	If Δn=0 then a. Kp , Kc b. p = Kx c. Kx = Kn d. All of these	D
6.	The reaction is at equilibrium if               a. Qc = Kc b. Qc > Kc c. Qc < Kc d. Qc << Kc	A
7.	Forward reaction will occur if a. Qc = Kc b. Qc > Kc c. Qc < Kc d. Qc << Kc	B
8.	Backward reaction will occur if a. Qc = Kc b. Qc > Kc c. Qc < Kc d. Qc << Kc	C
9.	The product concentration is much greater than reactants at equilibrium if a. Kc Is very large b. Kc Is very small c. Kc Is neither small nor large d. Non of these	A
10.	The reaction proceeds in little forward direction a. Kc Is very large b. Kc Is very small c. Kc Is neither small nor large d. Non of these	V
11.	The concentration of products and reactants are in appreciable quantities at equilibrium if a. Kc Is very large b. Kc Is very small c. Kc Is neither small nor large d. Non of these	C
12.	The optimum temperature for SO3 formation i                a. 400-5000 C b. 30000 C c. 4500 C d. Non of these	A
13.	The optimum temperature for NO2 formation is a. 400-5000 C b. 30000 C c. 4500 C d. Non of these	B
14.	The optimum temperature for NH3 formation is a. 400-5000 C b. 30000 C c. 4500 C d. Non of these	C
15.	What is the unit of kp in 2SO2 + O2 →2SO3 a. 1/ atm3 b. 1/atm c. atm d. No unit	B
16.	The reaction goes to completion, if its kc value is a. 102 c. b. 1030 d. 10-30	B
17.	The increase in the production of SO3 from SO2 and oxygen. The yield of SO3 can be increased by a. Increase temperature b. Adding a catalyst c. Adding more SO2 d. Removing 02	C
18.	Le Chatlier’s principle applies to a a. Mechanical system b. Chemical system c. Physical system d. Physical and chemical system	D
19.	Forward reaction goes to completion virtually if Kc is a. Positive and small b. Positive and large c. Negative and large d. unity	B
20.	Endothermic reaction are favored in the forward direction by a. Cooling b. Freezing c. Heating d. Adding a catalyst	C
21.	Molecules of chlorine decompose to a very small extinct because its Kc is a. Very small b. Very large c. zero d. 1	A
22.	How much reaction is completed when Kc=1 for a system A+B=C+D a. 10% b. 50% c. 90% d. 100%	B
23.	HCl when added to solution of H2S solution a. Suppress the ionization of H2S b. Enhance the ionization c. Solution become coloured d. Does not effect	A
24.	Kp is more than Kc when the difference of the moles of products and reactants is a. Zero b. Positive c. Negative d. one	B
25.	Reaction is not affected by a. Change in amount of product b. Change in amount of reactant c. Change in temperature d. Catalyst	D