| 1 |
The unit of Kc for the reaction N2 +O2 = 2NO will be |
- A. mol dm-3
- B. mol-1 dm+3
- C. mol-2 dm+6
- D. No units
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| 2 |
When HCl is added to H2S aqueous solution, Its ionization |
- A. Decrease
- B. Increase
- C. Remains constant
- D. First increases than decreases
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| 3 |
The sum of pH and pOH is |
|
| 4 |
When concentration of one product is removed at equilibrium stage, in which direction it moves to reestablish equilibrium. |
- A. Forward
- B. Reverse
- C. Neither forward nor reverse
- D. Equally move in both direction
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| 5 |
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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| 6 |
K<sub>a</sub>and K<sub>b</sub>of a conjugate acid and are related with k<sub>w</sub>as |
- A. K<sub>a </sub>+ K<sub>b</sub>=K<sub>w</sub>
- B. K<sub>a</sub>-K<sub>b</sub>=K<sub>w</sub>
- C. K<sub>a </sub>.<sub></sub>K<sub>b</sub>= K<sub>w</sub>
- D. K<sub>a</sub>/ K<sub>b</sub>= K<sub>w</sub>
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| 7 |
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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| 8 |
Which one of the following aqueous solutions has the highest pH |
- A. 0.1 M NaOH
- B. 0.1 M HCl
- C. 0.2 M H2SO4
- D. 0.1 M HNO3
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| 9 |
A solution have H+ ions concentration 1 x 10<sup>-7</sup> , its pH will |
- A. Acidic
- B. Basic
- C. Neutral
- D. Zero
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| 10 |
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
|