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1000 Chemical Reaction Engineering
Quiz 1
Solution
Q.1.
Catalyst is a substance that ___________
a) Can either increase or decrease the speed of a chemical reaction
b) Alters the value of the equilibrium constant in a reversible chemical reaction
c) Increases the speed of a chemical reaction
d) Decreases the speed of a chemical reaction
Q.2.
Which of the following is true for fluidized catalytic beds?
a) There is no pressure drop
b) They come under the category of batch reactors
c) The bulk density is a function of the flow rate through the bed
d) They cannot be used for multi-phase chemical reactions
Q.3.
In which of the following reaction the rate of reaction is a function of rate constant alone is?
a) Zero order reaction
b) Third order reaction
c) First order reaction
d) Second order reaction
Q.4.
Which of the following represents heterogeneous catalytic reaction?
a) Reduction of iron ore
b) Ammonia synthesis
c) Burning of coal
d) Roasting of ores
Q.5.
Which of the following is the most suitable reactor for the pharmaceutical industry?
a) PBR
b) MFR
c) PFR
d) Batch reactor
Q.6.
The rate constant of a first order reaction depends on the _____________
a) Temperature
b) Concentration
c) Time
d) Pressure
Q.7.
Which of the following is an example of autocatalytic reaction?
a) Oxidation of copper
b) Ammonia formation reaction
c) Hydrogen peroxide decomposition reaction
d) Reaction of permanganate with oxalic acid
Q.8.
Which of the following reactor arrangements causes fast deactivation?
a) Fluidised bed reactor
b) Batch for fluid and solid
c) Plug flow for fluid
d) Mixed flow for fluid
Q.9.
Which of the following is not a reversible reaction?
a) Oxidation of sulphur dioxide to sulphur trioxide
b) Ammonia formation from its elements
c) Formation of hydrogen bromide from its elements
d) Decomposition reaction of nitrogen pentoxide
Q.10.
If τ = 5 s, first order rate constant, k = 0.sec-1 and the number of tanks, N isthen the conversion is?
a) 87.45%
b) 33%
c) 75%
d) 67.2%
Q.11.
The catalyst in a first-order chemical reaction changes the _______________
a) Activation energy
b) Equilibrium constant
c) Heat of reaction
d) Heat of formation of the product
Q.12.
The rate of reaction is rapid for which of the following reactions?
a) Gas reactions in porous catalysts
b) Reactions in rocket engines
c) Cellular reactions
d) Reactions in coal furnaces
Q.13.
Which of the following is an isomerization reaction?
a) Conversion of glucose to fructose
b) Combustion reactions
c) Formation of ammonia from hydrogen and nitrogen
d) Decomposition of hydrogen peroxide to hydrogen and oxygen
Q.14.
Which of the following theories does not propose the temperature dependence of rate constant?
a) Transition state theory
b) Bohr’s theory
c) Arrhenius theory
d) Collision theory
Q.15.
What is the chemical reaction rate?
a) Chemical reaction rate is a chemical property
b) Chemical reaction rate is a physical property
c) Chemical reaction rate is an intensive property
d) Chemical reaction rate is an extensive property
Q.16.
Which of the following deals with the study of rates at which chemical reactions occur and the effect of various parameters on the rate?
a) Fluid Mechanics
b) Chemical Technology
c) Chemical Sciences
d) Chemical Kinetics
Q.17.
What is the unit of activation energy?
a) J/ mol
b) K
c) mol
d) mol.K
Q.18.
Which of the following is true for gas-phase reactions?
a) Decrease in moles of the product increases the volume of the reaction mixture
b) Increase in moles of the product does not affect the volume of the reaction mixture
c) Increase in moles of the product increases the volume of the reaction mixture
d) Increase in moles of the product decreases the volume of the reaction mixture
Q.19.
Which of the following is NOT a part of reactor design?
a) Flow rates of the reactant and product streams
b) Method of operation
c) Type of the reactor
d) Size of the reactor
Q.20.
Which of the following reactions follows elementary rate law?
a) Reversible catalytic decomposition of isopropyl benzene
b) Formation of hydrogen bromide
c) Vapor phase decomposition of ethanol
d) Cis-trans isomerization
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