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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPCl5, 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 CO2 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology13.8g 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology3.00 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. [PCl5] = 1.41 M; [PCl3] = [Cl2] = 1.59 M
2. [PCl5] = 1.61 M; [PCl3] = [Cl2] = 1.59 M
3. [PCl5] = 1.91 M; [PCl3] = [Cl2] = 1.71 M
4. [PCl5] = 2.41 M; [PCl3] = [Cl2] = 1.19 M
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 × 10–3
2. 3.56 × 10–3
3. 2.81 × 10–3
4. 3.81 × 10–3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHydrolysis 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 ×104 J mol–1
2. – 7.64 ×104 J mol–1
3. – 6.64 ×104 J mol–1
4. – 8.64 ×104 J mol–1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology