PCl5 is 50% dissociated at 20°C and 1 atm pressure. The value of Kp is

1. 0.444

2. 0.555

3. 0.333

4. 0.666

Subtopic:  Kp, Kc & Factors Affecting them |
 62%
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Kc for the reaction SO2(g)+NO2(g)SO3(g)+NO(g) is 16 at a given temperature. If we take one mole each of all the four gases in one litre vessel, the equilibrium concentration of SO2 and SO3 respectively in mol L-1 are 

1. 0.4, 0.8

2. 0.8, 0.16

3. 1.6, 0.8

4. 0.4, 1.6

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 67%
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The ratio of \({{K_{P}}\over{K_{C}}}\) for the reaction

CO(g)+12O2(g)CO2(g) is:

1. (RT)1/2  2. (RT)-1/2 
3. RT 4. 1

Subtopic:  Kp, Kc & Factors Affecting them |
 89%
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Determine the value of equilibrium constant (Kc) for the reaction

A2(g)+B2(g)2AB(g)

If 10 moles of A2; 15 moles of B2 and 5 moles of AB are placed in a 2 litre vessel and allowed to come to equilibrium. The final concentration of AB is 7.5 M:

1. 4.5

2. 1.5

3. 0.6

4. None of these

Subtopic:  Kp, Kc & Factors Affecting them |
 53%
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A 1 M solution of glucose reaches dissociation equilibrium given below.

C6H12O66HCHO

If the equilibrium constant is 0.167x10-22, the concentration of HCHO in the equilibrium is

1. 1.60×10-8 M

2. 3.20×10-6 M

3. 3.20×10-4 M

4. 1.60×10-4 M

Subtopic:  Kp, Kc & Factors Affecting them |
 59%
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For the dissociation reaction N2O4(g)2NO2(g) the degree of dissociation (α) in terms of Kp and total equilibrium pressure P is:

1. α=4P+KpKp

2. α=Kp4P+Kp

3. α=Kp4P

4. None of these

Subtopic:  Kp, Kc & Factors Affecting them | Salt Hydrolysis & Titration |
 56%
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When CO2 dissolves in water, the following equilibrium is established.

CO2+2H2OH3O++HCO3-

The equilibrium constant is 3.8×10-7 and at pH=6.0, the ratio [HCO3-][CO2] will be

1. 3.8×10-13

2. 3.8×10-1

3. 6.0

4. 13.4

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 76%
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At certain temperature compound AB2(g) dissociates according to the reaction

2AB2(g)2AB(g)+B2(g)

The value of Kp in terms of degree of dissociation 'α' and total pressure 'P' is

1. Pα32

2. Pα23

3. Pα33

4. Pα22

Subtopic:  Kp, Kc & Factors Affecting them |
 64%
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When NaNO3​ is heated in a closed vessel, O2​ is liberated and NaNO2​ is left behind. At equilibrium:

1. Addition of NaNO2​ favours reverse reaction

2. Addition of NaNO3​ favours forward reaction

3. Increasing temperature favours forward reaction.

4. None of these

Subtopic:  Le Chatelier's principle |
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An element X being with oxygen and CO present in air as

X(g)+O2(g)XO2(g); Kp1=27
X(g)+CO(g)XCO(g); Kp2=104

When X at 1 atm is treated with air, 25% of it is bound to CO(g). The partial pressure of CO(g) in air at equilibrium, if partial pressure of O2(g) in air at equilibrium is 0.2 atm, would be

1. 1.9×104 atm

2. 1.9×10-4 atm

3. 2.08×104 atm

4. 2.08×10-4 atm

Subtopic:  Kp, Kc & Factors Affecting them |
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