| 1 |
Sum of pKa and pKb is equal to. |
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| 2 |
pH of buffer is calculated by. |
- A. Sorenson equation
- B. Mosley equation
- C. Henderson equation
- D. De broglie equation
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| 3 |
Buffer action can be explained by |
- A. Common ion effect
- B. Law of mass action
- C. Le Chateller's principle
- D. All above
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| 4 |
The solubility product of AgCI is 2.0 x 10<sup>-10</sup>mol<sup>2</sup>dm<sup>-6</sup>The maximum concentration of Ag<sup>+</sup>ions in the solution is |
- A. 2.0 x 10<sup>-10</sup>mol dm<sup>-3</sup>
- B. 1.41 x 10<sup>-5</sup>mol dm<sup>-3</sup>
- C. 1.0 x 10<sup>-10</sup>mol dm<sup>-3</sup>
- D. 4.0 x 10<sup>-20</sup>mol dm<sup>-3</sup>
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| 5 |
Which statement is correct about solubility product constant. |
- A. It is applicable at highly soluble substances.
- B. Value of Kap is independent of temperature
- C. It is used for homogeneous aquarium system
- D. It can be used to predict that precipitation will take place or not by combining two ions
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| 6 |
The pH of 10-3 mole dm-3 of an aqueous solution of H2SO4 is. |
- A. 3.0
- B. 2.7
- C. 2.0
- D. 1.5
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| 7 |
The effect of temperature on equilibrium was studied by |
- A. Lewis
- B. Van der wall
- C. Arrhenius
- D. Vant hoff
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| 8 |
pKa of CH3COOH is 4.74. The pKb value of CH3COO- ions will be |
- A. 7
- B. 14
- C. 9.26
- D. zero
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| 9 |
The law of mass action was given by |
- A. D.C. down and P wage
- B. Gay Lussic and C.M
- C. C.M Goldberg and P. Waage
- D. Hendeson and Le Chateller's
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| 10 |
When solid KI dissolved in water, its heat of solution is positive. What would happen to dissolution when temperature is increased. |
- A. Increases
- B. Decreases
- C. Remain same
- D. Firs increases than decreases
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