| 1 |
Dilatometer method is useful for the reactions that involve. |
- A. Ionic species
- B. Where reactant absorb U.V. visible or infrared radiations
- C. Small volume changes in solutions
- D. Change in refractive indices
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| 2 |
When a chemical reaction is completed. |
- A. Instantaneous rate > average rate
- B. Instantaneous rate = average rate
- C. Instantaneous rate is zero
- D. Both average and instantaneous rates become zero
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| 3 |
Which one of the following statements is incorrect. |
- A. Enzymes are protein in nature
- B. Enzymes are catalyst
- C. Enzymes can catalyze any reaction
- D. Urease is an enzyme
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| 4 |
The true representation for the units of rate constant K for the first order reaction |
- A. sec<sup>-1</sup>
- B. mole dm<sup>-3</sup>s
- C. mole dm<sup>-3</sup>s<sup>-1</sup>
- D. mole<sup>-1</sup>dm<sup>+3</sup>s<sup>-1</sup>
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| 5 |
Half -Life for a given reaction is doubled if initial concentration is doubled. The order of reaction is. |
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| 6 |
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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| 7 |
a zero order reaction is one is which |
- A. Reactants do not react
- B. One reactant is in large excess
- C. Concentration of reactant do not change with passage of time
- D. Rate is of affected by changing concentration of reactants
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| 8 |
Which technique is used ot determine the absorption of radiations. |
- A. Spectrometry
- B. dilatometer method
- C. Refractometric method
- D. Optical rotation method
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| 9 |
The quantitative relationship between rate and concentration is given by. |
- A. Law of mass action
- B. Rate law
- C. Both of these
- D. Le Chatelier's principle
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| 10 |
With increases of 10 oC temperature the rate of reaction doubles. This increase in rate of reactions is due to. |
- A. Decrease in activation energy of reaction
- B. Decrease in the number of collisions between reactant molecules
- C. Increase in activation energy of reactants
- D. Increase in number of effective collisions
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