| 1 |
A type of meals are usually used as catalyst. |
- A. Coinage metal
- B. Alkali metals
- C. Transition metals
- D. alkaline earth metals
|
| 2 |
When a reaction proceeds in a sequence of steps, the overall rate is determined by |
- A. Fastest step
- B. Slowest step
- C. Order of different steps
- D. Molecularity of all steps
|
| 3 |
Photosynthesis a photochemical reaction has order of reaction |
- A. 0
- B. 1
- C. 2
- D. Fractional order
|
| 4 |
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
|
| 5 |
The rate of reaction determined at any given time is called. |
- A. Average rate
- B. Instantaneous rate
- C. Spontaneous rate
- D. Over all rate
|
| 6 |
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
|
| 7 |
Chemical reactivity of different substance is controlled by |
- A. Atomic number
- B. Electronic arrangement
- C. Mass number
- D. Number of isotope of reactant elements
|
| 8 |
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>
|
| 9 |
Half life period for 235 U is<div> 92</div> |
- A. 710 million years
- B. 810 milion years
- C. 720 million years
- D. 820 million years
|
| 10 |
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
|