In an acidic Buffer solution (CH3COOH + CH3COONa), the species mainly present in the solution are:

(Ignore negligible amount)

1. CH3COOH, CH3COO-, CH3COONa, H+

2. CH3COO-, Na+, CH3COOH

3. CH3COONa, CH3COO-, H+

4. CH3COO-, Na+, H+, CH3COONa

Subtopic:  Common Ion Effect |
 53%
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When NH4Cl is added in NH4OH solution, then pH of the solution

1. Increases

2. Decreases

3. Remains unchanged

4. Firstly decreases and more than decreases

Subtopic:  Common Ion Effect |
 62%
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The most hydrolyzed salt among the following is-

(Assume that Kb of all weak bases is the same)
1. NH4Cl
2. CuSO4
3. AlCl3
4. All are equally hydrolyzed.

Subtopic:  Salt Hydrolysis & Titration |
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The pH of 10-6 M CH3COOH (Ka = 1.8 X 10-5) is:

1. 5.37

2. In between 6 & 7

3. 7

4. 8.63

Subtopic:  pH calculation |
 52%
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60 ml 1M CH3COOH is mixed with 20 ml 1 M NaOH then pH of resulting solution will be

(Ka = 1.8 X 10-5, log1.8 = 0.25)

1. 8.55

2. 4.95

3. 4.45

4. 7.45

Subtopic:  Buffer |
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In which solvent, solubility of AgCl is maximum ?

1. 0.01 M NaCl

2. Pure Water

3. 0.01 M NH4OH

4. 0.05 M AgNO3

Subtopic:  Solubility Product |
 52%
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KpKc for the gaseous reaction:

I. 2A + 3B 2C
II. 2A4B
III. A+B+2C 4D

Would be respectively:

1. (RT)-3, (RT)2, (RT)0 

2. (RT)-3, (RT)-2, (RT)-1 

3. (RT)-3, (RT)2, (RT) 

4. None of the above

Subtopic:  Kp, Kc & Factors Affecting them |
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N2O4 dissociates as N2O4(g)2NO2(g) at 273 K and 2 atm pressure. The equilibrium mixture has a vapour density of 41. What will be the percentage degree of dissociation ?

1. 14.2%

2. 16.2%

3. 12.2%

4. 87.8%

Subtopic:  Introduction To Equilibrium |
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Inert gas is added to the equilibrium PCl5(g⇌ PCl3(g) + Cl2(g) at constant pressure. The degree of dissociation will :

1. Remain unchanged

2. Decrease

3. Increase

4. Decrease or increase but cannot be predicted with certainty

Subtopic:  Le Chatelier's principle |
 66%
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Dissociation of phosphorus pentachloride is favoured by:

1. High temperature and high pressure

2. High temperature and low pressure

3. Low temperature and low pressure

4. Low temperature and high pressure

Subtopic:  Le Chatelier's principle |
 70%
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