| 1 |
If the energy of the activated complex lies close to energy of reactants, it means that reaction is |
- A. Slow
- B. Fast
- C. Exothermic
- D. Endothermic
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| 2 |
After 3 half lives of a chemical reaction, the % fraction of the amount left is |
- A. 6.25
- B. 75
- C. 12.5
- D. 50
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| 3 |
Which technique is used ot determine the absorption of radiations. |
- A. Spectrometry
- B. dilatometer method
- C. Refractometric method
- D. Optical rotation method
|
| 4 |
When a reaction occurs in many steps than the slowest step is. |
- A. Mechanism step
- B. Rate determining step
- C. enthalpy determining step
- D. None of the above
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| 5 |
The rate of reaction |
- A. Increase as the reaction proceeds
- B. Decreases as the reaction proceeds
- C. Remains the same as the reactions proceeds
- D. May decrease or increase as the reaction proceeds
|
| 6 |
The influence of temperature on reaction rate is predicated by |
- A. Free energy change of reaction
- B. Arrhenius equation
- C. Van der weal's equation
- D. Kinetic equation
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| 7 |
With increase in 10°C temperature, the rate of reaction double. This increase in rate of reaction is due to |
- A. Decrease in activation energy of reaction
- B. Decrease in the number of collisions between reactant molecules
- C. Increases in activation energy of reactants
- D. Increase in number of effect collisions
|
| 8 |
The rate of reaction |
- A. Increases
- B. Decreases
- C. Remains the same
- D. May decrease of increase
|
| 9 |
The unit of the rate constant is same as that of the rate of reaction in |
- A. First order reaction
- B. Second order reaction
- C. Zero order reaction
- D. Third order reaction
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| 10 |
Velocity constant is the rate of reaction when the concentrations of reactants are |
- A. Zero
- B. Unity
- C. Two
- D. Three
|