Particle Size Measurement and Pseudo Order Reaction MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 22, 2025

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1. : Which of the following is the minimum size of particle which can be separated through sieve analysis?



2. : The method of particle size measurement is ______



3. : Which of the following is the instrument that is used for the examination of particle size = 0.5 micron?



4. : Sedimentation analysis is applicable to the liquid dispersions that are containing how much % solids?



5. : The sedimentation techniques are particularly useful for the particle size ranging from which of the following?



6. : What measure does the current that is generated in the photoelectric cell represent?



7. : In the photo-extinction method, a source of light is directed through which of the following suspension?



8. : The adsorption method for measurement of the total surface area always involves the evaluation of the quantity of which of the following?



9. : Due to what do fibrous fillers have a high capacity for absorbing energy?



10. : ______________ is an example of pseudo first order reaction?



11. : Yet which order kinetics are called pseudo unimolecular reaction reactions which are bimolecular?



12. : Which of the following are based on the collision model, the atoms at the top of the potential energy hill?



13. : _______ concentration plot is linear for a first-order reaction. A is one of the reactants



14. : Termolecular refers to which one?



15. : Threshold energy is the sum of which one?



16. : For the rate = k[NO]²[O₂] in a certain reaction, when the initial concentration of NO is tripled, what happens to the initial rate?



17. : Which of the following is the rate-determining step in a series of reactions?



 

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