The conjugate base of H3BO3 is:

1. B(OH)4-                                     

2. H2BO3-

3. HBO32-                                       

4. H4BO3+

Subtopic:  Acids & Bases - Definitions & Classification |
 63%
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Given a system: A(s)      2B(g) + 3C(g). 
If the concentration of C at eqilibrium is increased by a factor 2, it will cause the eqilibrium concentration of B to change to:

1. two times of its original value

2. one half of its original value

3. 22 times of its original value

4. 122 times of its original value

Subtopic:  Kp, Kc & Factors Affecting them |
 53%
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Ionisation constant of CH3COOH is 1.7 X 10-5 and concentration of H+ ions is 3.4 X 10-4.Then, find out initial concentration of CH3COOH molecules.            

1. 3.4 X 10-4 

2. 3.4 X 10-3

3. 6.8 X 10-4

4. 6.8 X 10-3

 

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 56%
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The formation of phosgene is represented as,

            CO + Cl2 COCl2

The reaction is carried out in 500 mL flask. At equilibrium o.3 mole of phosgene, 0.1 mole of CO and 0.1 mole of Cl2 are present. The equilibrium constant of the reaction is:

1. 30                     

2. 15

3. 5                       

4. 3

Subtopic:  Introduction To Equilibrium |
 64%
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The reaction quotient (Q) for the reaction, N2(g) + 3H2(g)       2NH3(g) is given by 

Q=NH32N2H23 The reaction will proceed towards the right side, if    

1. Q>Kc

2. Q=0

3. Q=Kc

4. Q<Kc

Subtopic:  Introduction To Equilibrium |
 74%
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The value of equilibrium constant of the reaction,HI(g)           12H2(g) + 12I2(g) is 8.0.

The equilibrium constant of the reaction, H2(g) + I2(g) 2HI(g)       wiill be [2008]

1. 116 

2. 164

3. 16

4. 18

Subtopic:  Introduction To Equilibrium |
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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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The hydrolysis of the salt of a strong acid and a weak base is called:

1. Anionic hydrolysis

2. Cationic hydrolysis

3. Amphoteric hydrolysis

4. None of the above

Subtopic:  Salt Hydrolysis & Titration |
 70%
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For the reaction, A+B ⇌ 3C at 25° C, a 3 litre vessel contains 1, 2, and 4 mole of A, B and C respectively. If Kc for the reaction is 10, then the reaction will proceed in:

1. forward direction                           

2. backward direction

3. in either direction                           

4. in equilibrium

Subtopic:  Introduction To Equilibrium |
 68%
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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 |
 75%
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