Equilibrium constants K1, and K2 for the following equilibria

NO(g)+12O2K1NO2(g) and
2NO2(g)K22NO(g)+O2

are related as

1. K2=1/K12

2. K2=K12

3. K2=1/K1

4. K2=K1/2

Subtopic:  Kp, Kc & Factors Affecting them |
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In a chemical equilibrium rate constant of forward reaction is 7.5×10-4 and the equilibrium constant is 1.5. The rate constant of a backward reaction is

1. 2.5×104

2. 5×10-4

3. 2.5×10-4

4. 5×104

Subtopic:  Kp, Kc & Factors Affecting them |
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PCl5gPCl3g+Cl2g

For the dissociation of PCl5- Kc is 2×10-7 at 27°C.

Find S° If H°=28.4 KJ/m

1. -0.0336 KJ/K

2. 0.0336 KJ/K

3. -0.0818 KJ/K

4. 0.338 KJ/K

Subtopic:  Kp, Kc & Factors Affecting them |
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The value of Kp for the reaction,

2H2S(g)2H2(g)+S2(g) is 1.2×10-2 at 1065°C.

The value of Kc is

1. <1.2×10-2

2. >1.2×10-2

3. 1.2×10-2

4. 0.12×10-2

Subtopic:  Kp, Kc & Factors Affecting them |
 70%
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In the reaction N2(g)+3H2(g)2NH3(g), when 100 mL of N2 has reacted, the volumes of H2 and NH3 are

1. 300 mL of H2 and 300 mL of NH3 

2. 100 mL of H2 and 200 mL of NH3 

3. 300 mL of H2 and 200 mL of NH3 

4. 100 mL of H2 and 100 mL of NH3 

Subtopic:  Introduction To Equilibrium |
 85%
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If a mixture containing 3 moles of hydrogen and 1 mole of nitrogen is converted completely into ammonia, the ratio of volumes of reactants and products at the same temperature and pressure would be

1. 2:1

2. 1:2

3. 1:3

4. 3:1

Subtopic:  Introduction To Equilibrium |
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Equilibrium constant for the reaction

2A(g)B(g)+C(g) at 780 k and 10 atm pressure is 3.52. The equilibrium constant of this reaction at 780 k and 20 atm pressure is

1. 5.72

2. 11.44

3. 28.6

4. 3.52

Subtopic:  Kp, Kc & Factors Affecting them |
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For the reaction, A+BC+D, the rate constants for the forward and backward reactions are found to be 4.2×10-2 and 3.36×10-3 mol L-1 s-1 respectively. What is the equilibrium constant for the reaction?

1. 11.5

2. 12.5

3. 8.0

4. 6.0

Subtopic:  Kp, Kc & Factors Affecting them |
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In the reaction 2H2S(g)2H2(g)+S2(g) the concentration of H2S is 0.5 mol L-1 and concentration of H2 is 0.1 mol L-1 while concentration of S2 is 0.4 mol L-1 in one litre vessel. The value of equilibrium constant of the reaction is

1. 0.016

2. 0.013

3. 0.020

4. 0.030

Subtopic:  Kp, Kc & Factors Affecting them |
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For a gaseous reaction ,2A+BC+D,

the partial pressure of A, B, C and D at equilibrium are 0.5, 0.8, 0.7 and 1.2 atm. The value of Kp for this reaction is

1. 2.4 atm

2. 6.2 atm-2

3. 4.2 atm-1

4. 8.4 atm-3

Subtopic:  Kp, Kc & Factors Affecting them |
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