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Chemical reaction engineering and reactor design
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Ionic reactions occur in solutions [other wrong options] [Discuss in forum] solid state only liquid state only any state |
Q22 ⇒ During manufacture of H2SO4, the oxidation of SO2 to SO3 by oxygen is an en-dothermic reaction. The yield of SO3 will be maximised, if the temperature is reduced and pressure is increased. [other wrong options] [Discuss in forum] temperature is increased. pressure is reduced. temperature is increased and pressure is reduced. |
Q23 ⇒ A batch reactor is suitable for liquid phase reactions involving small production rate. [other wrong options] [Discuss in forum] suitable for gas-phase reactions on commercial scale. least expensive to operate for a given rate. most suitable for very large production rate. |
Q24 ⇒ According to Arhenious equation of temperature dependency of rate constant for an elementary reaction k ∝ e-E/RT [other wrong options] [Discuss in forum] k ∝ T k ∝ T e-E/RT none of these |
Q25 ⇒ Design of heterogeous catalytic reactor involves consideration of __________ steps. both (a) & (b) [other wrong options] [Discuss in forum] only chemical only physical neither (a) nor (b) |
Q26 ⇒ Arhenious equation shows the variation of __________ with temperature. rate constant [other wrong options] [Discuss in forum] reaction rate energy of activation frequency factor |
Q27 ⇒ Limiting reactant in a chemical reaction decides the conversion [other wrong options] [Discuss in forum] rate constant reaction speed equilibrium constant. |
Q28 ⇒ In an exothermic reaction, the energy of the reacting substances as compared to that of products is more [other wrong options] [Discuss in forum] less same either (a) or (b), depends on order of reaction. |
Q29 ⇒ An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature. is always greater than [other wrong options] [Discuss in forum] is always equal to is always less than may be greater or less than |
Q30 ⇒ Pick out the wrong statement. Hydrolysis of ester in presence of alkali or acid is a zero order reaction. [other wrong options] [Discuss in forum] Autocatalytic reactions are exemplified by microbial fermentation reactions. The slowest step has the greatest influence on the overall reaction rate in case of an irreversible series reaction. The fractional conversion at any time is same for both the constant as well as the variable volume system in case of an irreversible unimolecular type first order reaction. |
Q31 ⇒ When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value. half [other wrong options] [Discuss in forum] twice equal none of these |
Q32 ⇒ For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance. diffusion through ash layer [other wrong options] [Discuss in forum] film diffusion chemical reaction either (a), (b) or (c) |
Q33 ⇒ Which of the following will give maximum gas conversion ? Semi-fluidised bed reactor. [other wrong options] [Discuss in forum] Fixed bed reactor. Fluidised bed reactor. Plug-flow catalytic reactor. |
Q34 ⇒ A multiple reaction may be classified as a __________ reaction. all (a), (b) and (c) [other wrong options] [Discuss in forum] consecutive or side parallel or side mixed |
Q35 ⇒ For an ideal plug flow reactor, the value of Peclet number is 0 [other wrong options] [Discuss in forum] ∞ 1 10 |
Q36 ⇒ For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times. 16 [other wrong options] [Discuss in forum] 8 12 32 |
Q37 ⇒ Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor ? Temperature should be high in the beginning and decreased towards the end of the reaction. [other wrong options] [Discuss in forum] Very low temperature should be used throughout the reaction. Very high temperature should be used throughout the reaction. none of these. |
Q38 ⇒ Which of the following factors control the deactivation of a porous catalyst pellet ? All (a), (b) and (c). [other wrong options] [Discuss in forum] Decay reactions. Pore diffusion. Form of surface attack by poison. |
Q39 ⇒ __________ is the response curve for a step input signal from a reactor. C-curve [other wrong options] [Discuss in forum] S-curve I-curve none of these |
Q40 ⇒ Promoter is added to the catalyst to improve its sensitivity [other wrong options] [Discuss in forum] porosity surface area none of these |
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