At a certain temperature and pressure of 105 Pa, iodine vapour contains 40% by volume of I atoms. The Kp for the equilibrium of the reaction would be-

 I2 (g)  2I (g)

1. 2.67 × 10Pa

2. 1.00 × 10Pa

3. 3.63 × 10Pa

4. 2.18 × 105 Pa

Subtopic:  Kp, Kc & Factors Affecting them |
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Given the reaction 2HI (g)  H2 (g) + I2 (g)

A sample of HI(g) is placed in a flask at a pressure of 0.2 atm. At equilibrium, the partial pressure of HI(g) is 0.04 atm.  The KP for the given equilibrium would be:

1. 2.0

2. 3.5 

3. 4.0

4. 2.6

Subtopic:  Kp, Kc & Factors Affecting them |
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A mixture of 1.57 mol of N2, 1.92 mol of H2, and 8.13 mol of NH3 is introduced into a 20 L vessel at 500 K. At this temperature, the equilibrium constant, Kc for the reaction N2 (g) + 3H2 (g)  2NH3 (g) is 1.7 × 102. The direction of the net reaction is

1. Reaction is at equilibrium

2. Reaction will proceed in forwarding direction

3. Reaction will proceed in the backward direction

4. Data is not sufficient

Subtopic:  Kp, Kc & Factors Affecting them |
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Given the reaction:

2BrCl (g)  Br2 (g) + Cl2 (g); Kc= 32 at 500 K. If the initial concentration of BrCl is 3.3 × 10-3 mol L–1, the molar concentration of BrCl in the mixture at equilibrium would be:

1. 3.0 × 10-2 molL-1

2. 2.0 × 10-4 molL-1

3. 2.5 × 10-6 molL-1

4. 3.0 × 10-4 molL-1

Subtopic:  Kp, Kc & Factors Affecting them |
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For the reaction, NO (g) + 1/2O2 (g)  NO2 (g)

 ∆fG° (NO2) = 52.0 kJ/mol , ∆fG° (NO) = 87.0 kJ/mol and ∆fG° (O2) = 0 kJ/mol.

The equilibrium constant for the formation of NO2 from NO and O2 at 298K would be

1. 2.36 × 104 

2. 3.10 × 107

3. 1.36 × 106

4. 2.18 × 105

Subtopic:  Kp, Kc & Factors Affecting them |
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The equilibrium constant for the following reaction is 1.6 ×105 at 1024K

H2(g) + Br2(g)  2HBr(g)

If HBr at pressure 10.0 bar is introduced into a sealed container at 1024 K, the equilibrium pressure of HBr will be :

1. 11.20 bar

2. 5.56 bar

3. 7.30 bar

4. 9.95 bar

Subtopic:  Kp, Kc & Factors Affecting them |
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A 0.02 M solution of pyridinium hydrochloride has a pH of 3.44. The ionization constant of pyridine will be:

1. 6.6 × 10-6

2. 1.51 × 10-9

3. 2.36 × 10-7

4. 3.43 ×10-9

Subtopic:  Salt Hydrolysis & Titration |
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The Ksp of Ag2CrO4 and AgBr is 1.1 × 10–12 and 5.0 × 10–13 respectively.

The molarity ratio of saturated solutions of Ag2CrO4 and AgBr will be:

1. 91.9

2. 108.6

3. 56.9

4. 76.9

Subtopic:  Solubility Product |
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When equal volumes of 0.002 M solutions of sodium iodate and cupric chlorate are mixed together (Ksp  (cupric iodate) = 7.4 × 10–8 ), from the following, the correct observation would be 

1. Precipitation will occur

2. Precipitation will not occur

3. There are 50 % chances of precipitation

4. Data is not sufficient to make any conclusive observation

Subtopic:  Solubility Product |
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The minimum volume of water required to dissolve 1g of calcium sulphate at 298 K is

(For CaSO4Ksp is 9.1 × 10–6)

1. 1.22 L

2. 0.69 L

3. 2.44 L

4. 1.87 L

Subtopic:  Solubility Product |
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