Which of the following is most soluble in water?

1. MnS (Ksp = 8x10-37)       

2. ZnS (Ksp = 7x10-16)

3. Bi2S3 (Ksp = 1x10-70)       

4. Ag2S (Ksp = 6x10-51)

Subtopic:  Solubility Product |
 73%
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The compound that does not act as Lewis acid is:

1. AlCl3                                             

2. BF3

3. NH3                                             

4. FeCl3

Subtopic:  Acids & Bases - Definitions & Classification |
 79%
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The values of Kp1 and Kp2 for the reactions

            XY + Z            ........(i)
and     A2B                 .........(ii)

are in ratio of 9:1, if degree of dissociation of X and A be equal, then total pressure at equilibrium (i) and (ii) are in the ratio 

(a) 3:1

(b) 1:9

(c) 36:1

(d) 1:1

Subtopic:  Kp, Kc & Factors Affecting them |
 62%
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For NH4HS(s) NH3 (g) + H2S(g), the observed pressure for reaction mixture in equilibrium is 1.12 atm at 106°C. The value of Kp for the reaction is:

(1) 3.136 atm                          

(2) 0.3136 atm2

(3) 31.36 atm2                           

(4) 6.98 atm2

Subtopic:  Kp, Kc & Factors Affecting them |
 71%
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The relation for calculating pH of a solution containing weak acid and its salt is:

(1) pH = pKa + log[Conjugate Base][Acid]

(2) pH = pKa - log[Conjugate Base][Acid]

(3) pH = pKa + log[Conjugate Base][Salt]

(4) pOH = pKa - log[Acid][Conjugate Base]

Subtopic:  Introduction To Equilibrium |
 73%
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Solubility of a gas in liquid increases on:

(1) addition of a catalyst

(2) increasing the pressure

(3) decreasing the pressure

(4) increasing the temperature

Subtopic:  Le Chatelier's principle |
 75%
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Which of these is least likely to act as a Lewis base?             

(1) CO         

(2) F-           

(3) BF3         

(4) PF3

Subtopic:  Acids & Bases - Definitions & Classification |
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The ionisation constant of ammonium hydroxide is 1.77 x 10-5 at 298 K. Hydrolysis constant of ammonium chloride is

(a) 5.65 x 10-10                      (b) 6.50 x 10-12

(c) 5.65 x 10-13                      (d) 5.65 x 10-12

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 69%
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For a given solution pH = 6.9 at 60°C, where Kw=10-12. The solution is:

(1) acidic                                           

(2) basic

(3) neutral                                         

(4) unpredictable

Subtopic:  pH calculation |
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The stronger Bronsted based is:

(a) ClO-                (b) ClO2-   

(c) ClO3-               (d)  ClO4- 

Subtopic:  Acids & Bases - Definitions & Classification |
 65%
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