75 ml of 0.2 M HCl is mixed with 25 ml of 1M HCl. To this solution, 300 ml of distilled water is added. What is the pH of the resultant solution?

1. 1

2. 2

3. 4

4. 0.2

Subtopic:  pH calculation |
 71%
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The dissociation constant of two acids HA1 and HA2 are 3.0×10-4 and 1.8×10-5 respectively. The relative strengths of the acids is

1. 1:16

2. 1:4

3. 4:1

4. 16:1

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 56%
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0.005 M acid solution has 5 pH. The percentage ionization of acid is

1. 0.8%

2. 0.6%

3. 0.4%

4. 0.2%

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 82%
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100 ml of 0.015 M HCl solution is mixed with 100 ml of 0.005 M HCl. What is the pH of the resultant solution?

1. 2.5

2. 1.5

3. 2

4. 1

Subtopic:  pH calculation |
 74%
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The solubility product of A2X3 is 1.08×10-23. Its solubility will be

1. 1.0×10-3 M

2. 1.0×10-4 M

3. 1.0×10-5 M

4. 1.0×10-6 M

Subtopic:  Solubility Product |
 82%
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M(OH) x has Ksp=4×10-12 and solubility 10-4 M, x is

1. 1

2. 2

3. 3

4. 4

Subtopic:  Solubility Product |
 78%
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The pH values of 1 M solutions of CH3COOH (I), CH3COONa (II), CH3COONH4 (III), and KOH (IV) will be in the order

1. IV>III>II>I

2. IV>II>III>I

3. I>III>II>IV

4. II>I>III>IV

Subtopic:  pH calculation |
 70%
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The ratio of the concentration of salt and acid for preparing a buffer solution of pH 6 by mixing sodium acetate and acetic acid will be: (Ka=10-5)

1. 1:10

2. 10:1

3. 100:1

4. 1:100

Subtopic:  Buffer |
 78%
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The strongest Bronsted base among the following ions is

1. CH3O-

2. (CH3)2CHO-

3. C2H5O-

4. (CH3)3CO-

Subtopic:  Acids & Bases - Definitions & Classification |
 61%
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The degree of ionization of water was found to be 1.8×10-9. The Ka (ionization constant) of water is

1. 1.8×10-9

2. 1.8×10-16

3. 1.8×10-14

4. cannot be calculated

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 57%
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