MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Reaction Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If rate of a zero order reaction is 10 ( frac{mol}{m^3 s} ) and reaction time is 5s, then the value of rate constant is ____ |
| A. | 1 s<sup>-1</sup> |
| B. | 2 s<sup>-1</sup> |
| C. | 5 s<sup>-1</sup> |
| D. | 10 s<sup>-1</sup> |
| Answer» C. 5 s<sup>-1</sup> | |
| 2. |
For a first order reaction, the rate constant is expressed in terms of initial concentration CAo and final concentration CA as ____ |
| A. | C<sub>A</sub> = C<sub>Ao</sub> k |
| B. | C<sub>A</sub> = C<sub>Ao</sub> e<sup>-kt</sup> |
| C. | C<sub>A</sub> = C<sub>Ao</sub> kt |
| D. | C<sub>A</sub> = C<sub>Ao</sub> e<sup>kt</sup> |
| Answer» C. C<sub>A</sub> = C<sub>Ao</sub> kt | |
| 3. |
Which among the following is true for liquid phase reactions of order n? |
| A. | ln( ( frac{-dC}{dt} )) = lnk + n(lnC) |
| B. | ln( ( frac{-dC}{dt} )) = lnk + lnC |
| C. | ln( ( frac{-dC}{dt} )) = nlnk + lnC |
| D. | ln( ( frac{-dC}{dt} )) = lnk + ( frac{lnC}{n} ) |
| Answer» B. ln( ( frac{-dC}{dt} )) = lnk + lnC | |
| 4. |
For a reaction with negative order n, which one of the following is true about reaction rate constant? |
| A. | k = (-r<sub>A</sub>) |
| B. | k = 1 |
| C. | k = ( frac{-r_A}{C_A^n} ) |
| D. | k = (-r<sub>A</sub>) C<sub>A</sub><sup>n</sup> |
| Answer» E. | |
| 5. |
For any order n, the rate constant is expressed as ____ |
| A. | (-r<sub>A</sub>) |
| B. | (-r<sub>A</sub>) C<sub>A</sub><sup>n</sup> |
| C. | (-r<sub>A</sub>) C<sub>A</sub> |
| D. | ( frac{-r_A}{C_A^n} ) |
| Answer» E. | |
| 6. |
The rate constant is a ____ |
| A. | Linear function of frequency factor |
| B. | Exponential function of frequency factor |
| C. | Logarithmic function of frequency factor |
| D. | Sinusoidal function of frequency factor |
| Answer» B. Exponential function of frequency factor | |
| 7. |
For a first order reaction, the rate constant as a function of half life is given as ____ |
| A. | ( frac{0.6931}{k} ) |
| B. | 0.6931 k |
| C. | 0.6931 |
| D. | ( frac{k}{0.6931} ) |
| Answer» B. 0.6931 k | |
| 8. |
Which among the following graphs represents a zero order reaction? |
| A. | <img alt="The graphs represents a zero order reaction - option a" class="alignnone size-full wp-image-282392" height="327" sizes="(max-width: 459px) 100vw, 459px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3a.png 459w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3a-300x214.png 300w" width="459"/> |
| B. | <img alt="The graphs represents a zero order reaction - option b" class="alignnone size-full wp-image-282394" height="332" sizes="(max-width: 477px) 100vw, 477px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b.png 477w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b-300x209.png 300w" width="477"/> |
| C. | <img alt="The graphs represents a zero order reaction - option c" class="alignnone size-full wp-image-282395" height="327" sizes="(max-width: 476px) 100vw, 476px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3c.png 476w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3c-300x206.png 300w" width="476"/> |
| D. | <img alt="The graphs represents a zero order reaction - option d" class="alignnone size-full wp-image-282396" height="324" sizes="(max-width: 465px) 100vw, 465px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3d.png 465w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3d-300x209.png 300w" width="465"/> |
| Answer» B. <img alt="The graphs represents a zero order reaction - option b" class="alignnone size-full wp-image-282394" height="332" sizes="(max-width: 477px) 100vw, 477px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b.png 477w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-reaction-kinetics-elements-modelling-rate-coefficient-1-q3b-300x209.png 300w" width="477"/> | |
| 9. |
Which of the following theories does not propose the temperature dependence of rate constant? |
| A. | Arrhenius theory |
| B. | Collision theory |
| C. | Transition state theory |
| D. | Bohr s theory |
| Answer» E. | |
| 10. |
The value of rate constant for a zero order reaction is obtained by the plot between ____ |
| A. | Concentration vs time |
| B. | Concentration vs rate |
| C. | Rate vs time |
| D. | Concentration vs rate |
| Answer» B. Concentration vs rate | |