Equimolar solutions of the following substances were prepared separetly. Which one of these will record the highest pH value?                                                                                             

1. BaCl2         

2. AlCl3         

 3. LiCl           

4. BeCl2

 

Subtopic:  Introduction To Equilibrium |
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The correct order of increasing [H3O+] in the following aqueous solutions is:

1. 0.01 M H2S < 0.01 M H2SO4<0.01 M NaCl<0.01M NaNO2

2. 0.01 M NaCl< 0.01 M NaNO2<0.01 M H2S< 0.01 M H2SO4

3. 0.01 M NaNO2<0.01 M NaCl<0.01 M H2S<0.01 M H2SO4

4. 0.01 M H2S<0.01 M NaNO2<0.01 M NaCl<0.01 M H2SO4

Subtopic:  Kp, Kc & Factors Affecting them |
 53%
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If the pressure of N2 and H2 mixture in a closed apparatus is 100 atm and 20% of the mixture then reacts, the pressure at  the same temperature would be:

1. 100                   

2. 90

3. 85                     

4. 80

Subtopic:  Introduction To Equilibrium |
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The following reactions are known to occur in the body,

    CO2 + H2OH2CO3H+ + HCO3-                 

If CO2 escapes from the system, then:

1. pH will decrease

2. hydrogen ion concentration will diminish

3. H2CO3 concentration will be unaltered

4. the forward reaction will be promoted

Subtopic:  Le Chatelier's principle |
 65%
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Which salt undergoes hydrolysis?

1. CH3COONa                                     

2. KNO3

3. NaCl                                               

4. K2SO4

Subtopic:  Acids & Bases - Definitions & Classification |
 78%
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If K1 and K2 are equilibrium constants for reactions (I) and (II) respectively for,

N2 + O2 2NO           .....(i)

12N212O2  NO     .....(ii)

Then:

1. K2 =K1                    

2. K2 =K1

3. K1 =2K2                    

4. K112K2

Subtopic:  Kp, Kc & Factors Affecting them |
 82%
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According to Le-Chatelier's principle, adding heat to a solid ⇌ liquid equilibrium will cause the :

1. Temperature to increase

2. Temperature to decrease

3. Amount of liquid to decrease

4. Amount of solid to decrease

Subtopic:  Le Chatelier's principle |
 61%
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Ostwald's solution dilution law is applicable in the case of the solution of:

1. CH3COOH                                     

2. NaCl

3. NaOH                                           

4. H2SO4

Subtopic:  Introduction To Equilibrium |
 84%
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At 25°C, the dissociation constant of a base, BOH is 1.0 x 10-12. The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be                                     

1. 2.0 x 10-6 mol L-1             

2. 1.0 x 10-5 mol L-1 

3. 1.0 x10-6 mol  L-1             

4. 1.0 x10-7 mol L-1 

Subtopic:  Kp, Kc & Factors Affecting them |
 64%
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The pKa of acetylsalicylic acid (aspirin) is 3.5. The pH of gastric juice in the human stomach is about 2-3 and the pH in the small intestine is about 8. Aspirin will be:

1. Unionized in the small intestine and in the stomach

2. Completely ionized in the small intestine and in the stomach

3. Ionized in the stomach and almost unionized in the small intestine

4. Ionized in the small intestine and almost unionized in the stomach

Subtopic:  Kp, Kc & Factors Affecting them |
 52%
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