| 1 |
Which statement about the following equilibrium is correct |
- A. The value of K<sub>p</sub>falls with a rise in temperature
- B. The value of K<sub>p</sub>falls with increasing pressure
- C. Adding V<sub>2</sub>O<sub>5</sub>catalyst increase the equilibrium yield of sulphur trioxide
- D. The value of K<sub>p</sub>is equal to K<sub>c</sub>
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| 2 |
At equilibrium stage of chemical reaction |
- A. The concentration of reaction is equal to concentration of products
- B. The rate constant of forward reaction is equal to rate constant of backward reaction
- C. The rate of forward reaction is equal rate of backward reaction
- D. The energy of activation of forward step is equal to energy of activation of backward step
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| 3 |
Sum of pKa and pKb is equal to. |
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| 4 |
For the equilibrium system N2 + O2 + Heat = 2NO the equilibrium constant deceases by |
- A. Decreasing the temperature
- B. Adding a catalyst
- C. Adding N2
- D. Adding NO
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| 5 |
A solution has pH zero. Its H+ ions concertation will |
- A. zero
- B. More than unity
- C. Less than unity
- D. Unity only
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| 6 |
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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| 7 |
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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| 8 |
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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| 9 |
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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| 10 |
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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