| 1 |
the substance which increase the rate of reaction but remains unchanged at the end of the reaction is called. |
- A. Indicator
- B. Promoter
- C. Catalyst
- D. Activated complex
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| 2 |
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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| 3 |
Almost forward reaction is complete when value of Kc is |
- A. very high
- B. Very small
- C. Neither large nor very small
- D. No correlation
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| 4 |
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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| 5 |
The effect of temperature on equilibrium was studied by |
- A. Lewis
- B. Van der wall
- C. Arrhenius
- D. Vant hoff
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| 6 |
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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| 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 |
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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| 9 |
The unit of equilibrium constant K<sub>c</sub>for the reaction |
- A. dm<sup>+6</sup>mole<sup>-2</sup>
- B. mole<sup>2</sup>dm<sup>-6</sup>
- C. Mole dm<sup>-3</sup>
- D. Having no units
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| 10 |
A chemical reaction A ---------- B is said to be in equilibrium when |
- A. Complete conversion of A to B has taken place
- B. Conversion of A to B is 50% complete
- C. Rate of transformation of A to B is equal to B to A
- D. 50% Reactant have been changed to B
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