MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical 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-1 |
| B. | 2 s-1 |
| C. | 5 s-1 |
| D. | 10 s-1 |
| Answer» C. 5 s-1 | |
| 2. |
For a first order reaction, the rate constant is expressed in terms of initial concentration CAo and final concentration CA as ____ |
| A. | CA = CAo × k |
| B. | CA = CAo × e-kt |
| C. | CA = CAo × kt |
| D. | CA = CAo × ekt |
| Answer» C. CA = CAo × 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 = (-rA)b) k = 1c) k = \(\frac{-r_A}{C_A^n} \) d) k = (-r |
| A. | k = (-rA) |
| B. | k = 1 |
| C. | k = \(\frac{-r_A}{C_A^n} \) |
| D. | k = (-rA) × CAn |
| Answer» E. | |
| 5. |
For any order n, the rate constant is expressed as ____a) (-rA)b) (-rA) × CAnc) (-r |
| A. | (-rA) |
| B. | (-rA) × CAn |
| C. | (-rA) × CA |
| 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 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. | |
| 9. |
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 | |