Chemical Reactions MCQs

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

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1. : Which of the following is the residual hardness in ion-exchange process?



2. : The half-life period of zero order reaction is directly proportional to which of the following?



3. : For a zero order reaction, the rate of reaction is independent of which of the following?



4. : The exhausted cation exchange column is regenerated by passing which of the following solution?



5. : What is the Ion-free water coming out from the exchanger called?



6. : Not an example of zero order reaction is ____________



7. : The half-life period of first order reaction is 15 min. Its rate constant will be equal to which of the following?



8. : In a first order reaction, the time required for the completion of 99% is how many times to the time required for the completion of half of the reaction?



9. : Not an example of second order reaction is ______________



10. : The half-life period of nth order reaction varies inversely to which of the following power of the initial concentration of the reactants?



11. : What is the order of the reaction, if the time of half-completion is changed from 50 sec to 25 sec, when the initial concentration is changed from 0.5 to 1M?



12. : If a compound decomposes according to the first order rate law with a half-life period of 30 min, then the fraction of the remaining compound after 120 min is _____________



13. : In a first order reaction, the time required for the completion of 99% is which of the following for its 90% completion?



14. : The statement that is incorrect about demineralised water is ____________



15. : For a first order reaction, the half-life period is independent of which of the following?



16. : The thermal decomposition of nitrogen pentaoxide in the gaseous phase is the example of which of the following?



17. : The ion that gets released from the cation exchange column is ___________



18. : The ion that gets released from the anion exchange column is



19. : Which of the following is the ion-exchange resin?



20. : The exhausted anion exchange column is regenerated by passing which of the following solution?



21. : In ion-exchange process, what are the capital cost and the operational expenses?



 

 

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