The value of H for the reaction,

   X2(g) + 4Y2(g2XY4 (g)

is less than zero. Formulation of XY4(g) will be favored at                           

1. low pressure and low temperature

2. high temperature and low pressure

3. high pressure and low temperature

4. high temperature and high pressure

Subtopic:  Le Chatelier's principle |
 75%
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Salting out action of the soap is based on:

1. Complex ion formation

2. Common ion effect

3. Solubility product

4. Acid-base neutralization

Subtopic:  Solubility Product |
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Which is not an acid salt?

1. NaH2PO2                                   

2. NaH2PO3

3. NaH2PO4                                   

4.  NaHSO3

Subtopic:  Acids & Bases - Definitions & Classification |
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 The following equilibria are given

 N2 + 3H2  2NH3,      K1

N2 + O2  2NO,          K2

H212O2  H2O,       K3

The equilibrium constant of the reaction, 2NH352O2  2NO + 3H2O in terms of  K1, K2 and K3 is  

1. K1K33/K2                       

2. K2K33/K1

3. K1K2K3                            

4. K1K2/K3 

Subtopic:  Kp, Kc & Factors Affecting them |
 88%
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The pKa for acid A is greater than pKa for acid B. The strong acid is:

1. Acid A                                           

2. Acid B

3. Are equally strong                         

4. None of the above

Subtopic:  Acids & Bases - Definitions & Classification |
 84%
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At a certain temperature, 2HI H2 +I2 only 50% HI is dissociated at equilibrium. The equilibrium constant is:

1. 1.0                     

2. 3.0                 

3. 0.5               

4. 0.25

Subtopic:  Kp, Kc & Factors Affecting them |
 63%
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A solution of FeCl3 in water acts as acidic due to:

1. Acidic impurities                         

2. Ionization

3. Hydrolysis of Fe3+                       

4. Dissociation

Subtopic:  Salt Hydrolysis & Titration |
 72%
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Which of the following solution does not act as buffer?

1. H3PO4 + NaH2PO4

2. Na2CO3 + H2CO3

3. HCl + NH4Cl

4. CH3COOH + CH3COONa

Subtopic:  Buffer |
 71%
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Which equilibrium can be described as Lewis acid-base reaction but not Bronsted acid-base reaction?

1. H2O + CH3COOHH3O+ + CH3COO-

2. 2NH3 + H2SO4 2NH4+ + SO42-

3. NH3 + CH3COOH NH4+ + CH3COO-

4. [Cu(H2O)4]2+ + 4NH3  [Cu(NH3)4]2+ + 4H2O

Subtopic:  Acids & Bases - Definitions & Classification |
 73%
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In the reaction, PCl⇌ PCl3 + Cl2, the amounts of PCl5, PCl3, and Cl2 at equilibrium are 2 moles each and the total pressure is 3 atm. The equilibrium constant Kp is: 

1. 1.0 atm                                       

2. 2.0 atm

3. 3.0 atm                                       

4. 6.0 atm

Subtopic:  Kp, Kc & Factors Affecting them |
 66%
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