| 1 |
Le-Chatelier Braun principle is sometimes known as |
- A. Law of mass action
- B. Law of mobile equilibrium
- C. Law of active mass
- D. All of these above
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| 2 |
The value of pH and P<sup>oH</sup>of pure water at 25° C is |
- A. 14
- B. 7
- C. 1 x 10<sup>-14</sup>
- D. 1 x 10<sup>14</sup>
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| 3 |
One dm3 of a buffer solution containing 0.01 M NH4Cl and 0.1 M NH4OH having pKa of 3 has pH. |
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| 4 |
Optimum pressure in Haber's process for synthesis of Ammonia is |
- A. 100 -150 atm
- B. 200- 300 atm
- C. 350 - 450 atm
- D. 500 - 600 atm
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| 5 |
When small amount of acid or base is added to buffer, its pH. |
- A. Remain same
- B. Always increases
- C. Always decreases
- D. slightly increases or decreases
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| 6 |
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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| 7 |
Some impurities of MgCl2 are present in NaCl which separation technique can be used to separate the impurities. |
- A. Filtration
- B. Crystallization
- C. Common ion effect
- D. Chromatography
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| 8 |
An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate |
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| 9 |
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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| 10 |
pH of rain water. |
- A. 7
- B. Slightly basic
- C. slightly acidic
- D. Highly basic
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