# At equilibrium, the concentrations of N2=3.0 × 10–3M, O2 = 4.2 × 10–3M and NO= 2.8 × 10–3M in a sealed vessel at 800K. The value of Kc for the reaction given below is- N2(g) + O2(g) $⇋$ 2NO(g) 1. 0.622 2. 06.22 3. 0.562 4. 0.662

Subtopic:  Introduction To Equilibrium |
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PCl5, PCl3 and Cl2 are at equilibrium at 500 K and having concentrations 1.59M PCl3, 1.59M Cl2 and 1.41 M PCl5. The value of Kc for the reaction, PCl5 $⇋$PCl3 + Cl2 is-

1. 0.179

2. 17.9

3. 1.79

4. 179

Subtopic:  Introduction To Equilibrium |
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The value of Kc = 4.24 at 800K for the reaction,

CO(g) + H2O(g) CO2 (g) + H2 (g)

If only CO and H2O are present initially at concentrations of 0.10M each.

The equilibrium concentrations of CO2, and CO are-

1. 0.067 M; 0.033 M
2. 0.76 M; 0.029 M
3. 0.65 M; 0.027 M
4. 0.061 M; 0.30 M

Subtopic:  Introduction To Equilibrium |
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For the equilibrium,

2NOCl(g) $⇋$2NO(g) + Cl2(g)

the value of the equilibrium constant, Kc  is 3.75 × 10–6 at 1069 K.

The value of Kp for the reaction at this temperature is-

1. 0.048

2. 0.67

3. 0.29

4. 0.033

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

CO2 (g) + C (s) $⇋$2CO (g)

is 3.0 at 1000 K. If initially  $$P_{CO_{2}}$$= 0.48 bar and PCO = 0 bar and pure graphite is present.
The equilibrium partial pressures of CO and CO
2 are respectively-

1. 0.56 bar; 0.15 bar
2. 0.15 bar; 0.75 bar
3. 0.66 bar; 0.15 bar
4. 0.66 bar; 0.25 bar

Subtopic:  Introduction To Equilibrium |
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The value of Kc for the reaction 2A $⇋$B + C is 2 × 10–3.
At a given time, the composition of the reaction mixture is [A] = [B] = [C] = 3 × 10
4 M.
The reaction will proceed -

1. In the backward direction
2. In the forward direction
3. In the both direction
4. Cannot predict

Subtopic:  Introduction To Equilibrium |
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13.8g of N2O4 was placed in a 1L reaction vessel at 400K and allowed to attain equilibrium

N2O4 (g) $⇋$ 2NO2 (g)

The total pressure at equilbrium was found to be 9.15 bar. The  value of Kc is-

1. 3.2
2. 2.6
3. 2.1
4. 3.6

Subtopic:  Kp, Kc & Factors Affecting them |
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3.00 mol of PCl5 kept in 1L closed reaction vessel was allowed to attain equilibrium at 380K. The
composition of the mixture at equilibrium is-

(Given: Kc= 1.80)

1. [PCl
5] = 1.41 M; [PCl3] = [Cl2] = 1.59 M
2. [PCl
5] = 1.61 M; [PCl3] = [Cl2] = 1.59 M
3. [PCl
5] = 1.91 M; [PCl3] = [Cl2] = 1.71 M
4. [PCl
5] = 2.41 M; [PCl3] = [Cl2] = 1.19 M

Subtopic:  Introduction To Equilibrium |
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The value of G for the phosphorylation of glucose in glycolysis is 13.8 kJ/mol.
The value of
Kc at 298 K is-

1. 5.21 × 103
2. 3.56 × 103
3. 2.81 × 103
4. 3.81 × 103

Subtopic:  Kp, Kc & Factors Affecting them |
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Hydrolysis of sucrose gives,

Sucrose + H2O  $⇋$Glucose + Fructose

The equilibrium constant Kc for the reaction is 2 ×1013 at 300K. The value of G at 300K is-

1. – 5.64 ×10
4 J mol–1
2. – 7.64 ×104 J mol–1
3. – 6.64 ×104 J mol–1
4. – 8.64 ×104 J mol–1

Subtopic:  Kp, Kc & Factors Affecting them |
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