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For the reaction : NX2(g)+3HX2(g)↽−−⇀2NHX3(g) Equilibrium constant KC=[NH3]2[N2][H2]3 Some reactions are written below in Column I and their equilibrium constants in terms of Kc are written in Colum - Chemistry

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प्रश्न

For the reaction : \[\ce{N2 (g) + 3H2 (g) ⇌ 2NH3 (g)}\]

Equilibrium constant `K_C = ([NH3]^2)/([N_2][H_2]^3)`

Some reactions are written below in Column I and their equilibrium constants in terms of Kc are written in Column II. Match the following reactions with the corresponding equilibrium constant

Column I (Reaction) Column II (Equilibrium constant)
(i) \[\ce{2N2 (g) + 6H2 (g) ⇌ 4NH3 (g)}\] (a) `2K_c`
(ii) \[\ce{2NH3 (g) ⇌ N2 (g) + 3H2 (g)}\] (b) `K_c^(1/2)`
(iii) \[\ce{1/2 N2 (g) + 3/2 H2 (g) ⇌ NH3 (g)}\] (c) `1/K_c`
  (d) `K_c^2`
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उत्तर

Column I (Reaction) Column II (Equilibrium constant)
(i) \[\ce{2N2 (g) + 6H2 (g) ⇌ 4NH3 (g)}\] (d) `K_c^2`
(ii) \[\ce{2NH3 (g) ⇌ N2 (g) + 3H2 (g)}\] (c) `1/K_c`
(iii) \[\ce{1/2 N2 (g) + 3/2 H2 (g) ⇌ NH3 (g)}\] (b) `K_c^(1/2)`
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Law of Chemical Equilibrium and Equilibrium Constant
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अध्याय 7: Equilibrium - Multiple Choice Questions (Type - I) [पृष्ठ ९२]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 11
अध्याय 7 Equilibrium
Multiple Choice Questions (Type - I) | Q 39 | पृष्ठ ९२

संबंधित प्रश्न

What is Kc for the following equilibrium when the equilibrium concentration of each substance is: [SO2] = 0.60 M, [O2] = 0.82 M and [SO3] = 1.90 M?

\[\ce{2SO2(g) + O2(g) ⇌ 2SO3(g)}\]


Write the expression for the equilibrium constant, Kc for each of the following reactions:

\[\ce{2NOCl (g) ⇌ 2NO (g) + Cl2 (g)}\]


Write the expression for the equilibrium constant, Kc for the following reactions:

\[\ce{2Cu(NO3)2 (s) ⇌ 2CuO (s) + 4NO2 (g) + O2 (g)}\]


Write the expression for the equilibrium constant, Kc for the following reactions:

\[\ce{CH3COOC2H5(aq) + H2O(l) ⇌CH3COOH (aq) + C2H5OH (aq)}\]


Write the expression for the equilibrium constant, Kc for following reactions:

\[\ce{Fe^{3+}(aq) + 3OH^-(aq) ⇌ Fe(OH)3(s)}\]


Write the expression for the equilibrium constant, Kc for the following reactions

\[\ce{I2 (s) + 5F2 ⇌ 2IF5}\]


Calculate a) ΔG°and b) the equilibrium constant for the formation of NO2 from NO and O2 at 298 K

\[\ce{NO(g) + 1/2 O_2 (g) <=> NO_2(g)}\]

where ΔfG (NO2) = 52.0 kJ/mol

ΔfG (NO) = 87.0 kJ/mol

ΔfG (O2) = 0 kJ/mol


Predict which of the following reaction will have the appreciable concentration of reactants and products:

  1. \[\ce{Cl2 (g) ⇌ 2Cl (g)}\] Kc = 5 ×10–39
  2. \[\ce{Cl2 (g) + 2NO (g) ⇌ 2NOCl (g)}\] Kc = 3.7 × 108
  3. \[\ce{Cl2 (g) + 2NO2 (g) ⇌ 2NO2Cl (g)}\] Kc = 1.8

The value of Kc for the reaction 3O2 (g) ↔ 2O3 (g) is 2.0 ×10–50 at 25°C. If the equilibrium concentration of O2 in the air at 25°C is 1.6 ×10–2, what is the concentration of O3?


The reaction, \[\ce{CO(g) + 3H2(g) ↔ CH4(g) + H2O(g)}\] is at equilibrium at 1300 K in a 1L flask. It also contains 0.30 mol of CO, 0.10 mol of H2 and 0.02 mol of H2O and an unknown amount of CH4 in the flask. Determine the concentration of CH4 in the mixture. The equilibrium constant, Kc for the reaction at the given temperature is 3.90.


For the reaction \[\ce{H2 (g) + I2 (g) ⇌ 2HI (g)}\], the standard free energy is  ∆GΘ > 0. The equilibrium constant (K ) would be ______.


On increasing the pressure, in which direction will the gas phase reaction proceed to re-establish equilibrium, is predicted by applying the Le Chatelier’s principle. Consider the reaction.

\[\ce{N2 (g) + 3H2 (g) ⇌ 2NH3 (g)}\]

Which of the following is correct, if the total pressure at which the equilibrium is established, is increased without changing the temperature?


Match standard free energy of the reaction with the corresponding equilibrium constant.

Column I Column II
(i) ∆GΘ > 0 (a) K > 1
(ii) ∆GΘ > 0  (b) K = 1
(iii) ∆GΘ = 0 (c) K = 0
  (d) K < 1

For the reaction,

\[\ce{N2 + O2(g) ⇌ 2NO(g)}\]

the equilibrium constant is K1. The equilibrium constant is K2 for the reaction

\[\ce{2NO(g) + O2(g) ⇌ 2NO2(g)}\]

What is "K" for the reaction:

\[\ce{NO2(g) ⇌ 1/2 N2(g) + O2(g)}\]?


The stepwise formation of [Cu(NH3)4]2+ is given below:

\[\ce{Cu^{2+} + NH3 <=>[K1] [Cu(NH3)]^{2+}}\]

\[\ce{[Cu(NH3)]^{2+} + NH3 <=>[K2] [Cu(NH3)2]^{2+}}\]

\[\ce{[Cu(NH3)2]^{2+} + NH3 <=>[K3] [Cu(NH3)3]^{2+}}\]

\[\ce{[Cu(NH3)3]^{2+} + NH3 <=>[K4] [Cu(NH3)4]^{2+}}\]

The value of stability constants K1, K2, K3 and K4 are 104, 1.58 × 102, 5 × 103 and 102 respectively. The overall equilibrium constant for dissociation of [Cu(NH3)4]2+ is x × 10−12. The value of x is ______. (Rounded-off to the nearest integer)


For which of the following Kp is less than Kc?


The equilibrium constant for the reaction is ______ × 1026.

\[\ce{Fe + CuSO4 <=> FeSO4 + Cu}\] at 25°C.

Given `"E"_("Fe"//"Fe"^(2+))^0` = 0.44 V

`"E"_("Cu"//"Cu"^(2+))^0` = - 0.337 V


The value of Kc is 64 at 800 K for the reaction \[\ce{N2(g) + 3H2(g) <=> 2NH3(g)}\].

The value of Kc for the following reaction is:

\[\ce{NH3(g) <=> 1/2N2(g) + 3/2H2(g)}\]


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