Users Also Read
Read MCQ's/Objective questions
MCQ's Search Engine
Chemical Engineering Basics
Chemical Engineering Plant Economic
Chemical Engineering Thermodynamic
Chemical Process Industries
Environmental Engineering
Fertiliser Technology
Fluid Mechanics
Fuels and Combustion
Furnace Technology
Heat Transfer
Mass Transfer
Materials and Construction
Mechanical Operations
Nuclear Power Engineering
Petroleum Refinery Engineering
Polymer Technology
Process Control and Instrumentation
Process Equipment and Plant Design
Refractory Technology
Stoichiometry
Home⇒ Engineering⇒
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. |
Q1 ⇒ The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is 1 [other wrong options] [Discuss in forum] ∞ 0 > 1 |
Q2 ⇒ For identical flow rate, feed composition and for elementary first order reactions, 'N' equal sized mixed reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for constant density systems. This is true, when the value of 'N' is ∞ [other wrong options] [Discuss in forum] 1 >1 ≥1 |
Q3 ⇒ Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is 1 [other wrong options] [Discuss in forum] 0 2 3 |
Q4 ⇒ Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure ? Adsorption isobar [other wrong options] [Discuss in forum] Langmuir adsorption isotherm Freundlich adsorption isotherm None of these |
Q5 ⇒ A batch reactor is characterised by variation in extent of reaction and properties of the reaction mixture with time. [other wrong options] [Discuss in forum] constant residence time. variation in reactor volume. very low conversion. |
Q6 ⇒ In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO2 to SO3 is accomplished by a __________ reaction. catalytic homogenous [other wrong options] [Discuss in forum] non-catalytic homogeneous non-catalytic heterogeneous catalytic heterogeneous |
Q7 ⇒ Catalyst carriers provide large surface area with a small amount of active material. [other wrong options] [Discuss in forum] have very high selectivity. increase the activity of a catalyst. inhibit catalyst poisoning. |
Q8 ⇒ Differential method for analysing the kinetic data is used for testing complicated mechanisms. [other wrong options] [Discuss in forum] when the data are scattered. when rate expressions are very simple. none of these. |
Q9 ⇒ In autocatalytic reactions, one of the products acts as a catalyst. [other wrong options] [Discuss in forum] one of the reactants acts as a catalyst. catalysts have very high selectivity. no catalyst is used. |
Q10 ⇒ A photochemical reaction is initiated by light. [other wrong options] [Discuss in forum] accompanied with emission of light. catalysed by light. all (a), (b) & (c). |
Q11 ⇒ Three plug flow reactors (PFR's) of 4, 5 & 6 m3 volumes are arranged in two branches as shown below in the fig 100 [other wrong options] [Discuss in forum] 150 200 225 |
Q12 ⇒ Which of the following is not a theory of homogeneous reaction? None of these [other wrong options] [Discuss in forum] Collision theory and activated complex theory Chain reaction theory Radiation hypothesis |
Q13 ⇒ A reaction which is catalysed by an acid is also catalysed by any substance, which has a tendency to lose a proton. [other wrong options] [Discuss in forum] gain a proton. lose an electron none of these. |
Q14 ⇒ Half life period of a chemical reaction is the time required to reduce the concentration of the reacting substance to half its initial value. [other wrong options] [Discuss in forum] half of the space time of a reaction. half of the residence time of a reaction. none of these |
Q15 ⇒ Effectiveness factor of a catalyst pellet is a measure of the __________ resistance. pore diffusion [other wrong options] [Discuss in forum] gas film chemical reaction none of these |
Q16 ⇒ There is no correspondence between stoichiometry and the rate equation in case of a/an __________ reaction. non-elementary [other wrong options] [Discuss in forum] elementary multiple autocatalytic |
Q17 ⇒ A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction. equal to or more than [other wrong options] [Discuss in forum] less than equal to more than |
Q18 ⇒ The rate at which a chemical substance reacts is proportional to its active mass [other wrong options] [Discuss in forum] molecular weight equivalent weight atomic weight |
Q19 ⇒ A backmix reactor is same as ideal stirred tank reactor. [other wrong options] [Discuss in forum] is same as plug-flow reactor. employs mixing in axial direction only. is most suitable for gas phase reaction. |
Q20 ⇒ Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in saliva [other wrong options] [Discuss in forum] blood intestine gland |
Or |