The equilibrium of three reactions with their respective equilibrium constants are given below,

\( \begin{array}{lc} \mathrm{N}_2+3 \mathrm{H}_2 \rightleftharpoons 2 \mathrm{NH}_3 & \mathrm{~K}_1 \\ \mathrm{~N}_2+\mathrm{O}_2 \rightleftharpoons 2 \mathrm{NO} & \mathrm{K}_2 \\ \mathrm{H}_2+\frac{1}{2} \mathrm{O}_2 \rightleftharpoons \mathrm{H}_2 \mathrm{O} & \mathrm{K}_3 \end{array} \)

The equilibrium constant (K) of the following reaction will be : 
2NH3+52O2 K 2NO+3H2O

1. \( \frac{K_{2}K_{3}^{3}}{K_{1}}\)
2. \( \frac{K_{2}K_{3}}{K_{1}}\)
3. \( \frac{K_{2}^{3}K_{3}}{K_{1}}\)
4. \( \frac{K_{3}^{3}K_{1}}{K_{2}}\)

Subtopic:  Kp, Kc & Factors Affecting them |
 80%
From NCERT
NEET - 2017
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A 20-litre container at 400 K contains CO2 (g) at pressure 0.4 atm and an excess of SrO (neglecting the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container.
The maximum volume of the container, when the pressure of CO2 attains its maximum value will be:
(Given that: SrCO3(s) ⇋ SrO(s) + CO2(g) , Kp = 1.6 atm) 

1. 10 litre 2. 2 litre
3. 4 litre 4. 5 litre
Subtopic:  Kp, Kc & Factors Affecting them |
 61%
From NCERT
NEET - 2017
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If the equilibrium constant for N2(g) + O2 (g) ⇄ 2NO(g) is K, the equilibrium constant for 
\(\frac{1}{2}\)N2(g) + \(\frac{1}{2}\)O2(g) ⇄ NO(g)
will be?

1. K12

2. 12K

3. K

4. K2

Subtopic:  Kp, Kc & Factors Affecting them |
 83%
From NCERT
NEET - 2015
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The value of the equilibrium constant for a particular reaction is 1.6 x 1012. When the system is in equilibrium, it will include:

1. All reactants 2. Mostly reactants
3. Mostly products 4. Similar amounts of reactants and products
Subtopic:  Kp, Kc & Factors Affecting them |
 70%
From NCERT
NEET - 2015
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Given that the equilibrium constant for the reaction 

2SO2(g) + O2(g)  2SO3(g) 

has a value of 278 at a particular temperature, the value of the equilibrium constant for the following reaction at the same temperature will be:

SO3(g)   SO2(g) + 1/2 O2(g) 

1.  3.6 × 10-3 

2.  6.0 × 10-2 

3.  1.3 × 10-5 

4.  1.8 × 10-3 

Subtopic:  Kp, Kc & Factors Affecting them |
 72%
From NCERT
AIPMT - 2012
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Given reaction:  A2(g) + B2(g)  ⇋ 2AB(g)  

At equilibrium, the concentrations of  A2 = 3.0×10-3 M;  B2 = 4.2×10-3 M and AB=2.8×10-3M. If the reaction takes place in a sealed vessel at  527 °C, then the value of  KC will be: 

1. 3.9  2. 0.6 
3. 4.5 4. 2.0 
Subtopic:  Kp, Kc & Factors Affecting them |
 82%
From NCERT
AIPMT - 2012
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For the reaction N2(g) + O2(g)2NO(g) the equilibrium constant is K1. The equilibrium constant is K2 for the reaction  2NO(g) + O2(g) 2NO2(g) 
The value of K for the reaction given below will be:
NO2(g)12N2(g) +O2(g) 

1.  14 4 K1 K2

2.  1K1K21/2

3.  1K1K2

4.  12K1K2

Subtopic:  Kp, Kc & Factors Affecting them |
 88%
From NCERT
AIPMT - 2011
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The equilibrium reaction that doesn't have equal values for Kc and Kis: 

1. \(2NO(g) \rightleftharpoons N_2(g) + O_2(g)\)
2. \(SO_2(g) + NO_2(g) \rightleftharpoons SO_3(g) + NO(g)\)
3. \(H_2(g) + I_2(g) \rightleftharpoons 2HI (g)\)
4. \(2C(s) + O_2(g) \rightleftharpoons 2CO_2(g)\)

Subtopic:  Kp, Kc & Factors Affecting them |
 90%
From NCERT
AIPMT - 2010
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The reaction-

2A+B(g)  3C(g)+D(g)

begins with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium is reached, the concentration of D is measured and found to be 0.25 M. The value for the equilibrium constant for this reaction is given by the expression:

1. [(0.75)3(0.25)]÷[(0.50)2(0.75)]

2. [(0.75)3(0.25)]÷[(0.50)2(0.25)]

3. [(0.75)3(0.25)]÷[(0.75)2(0.25)]

4. [(0.75)3(0.25)]÷[(1.00)2(1.00)]

Subtopic:  Kp, Kc & Factors Affecting them |
 65%
From NCERT
AIPMT - 2010
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The dissociation constants for acetic acid and HCN at 25 °C are 1.5 x 10-5 and 4.5 x 10-10, respectively. The equilibrium constant for the equilibrium, 
CN- + CH3COOH  ⇌  HCN + CH3COO- 
would be:
1. 3.0×105
2. 3.0×10-5
3. 3.0×10-4
4. 3.0×104

Subtopic:  Kp, Kc & Factors Affecting them |
From NCERT
AIPMT - 2009
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