Which of the following is not a theory of homogeneous reaction?
A. Collision theory and activated complex theory
B. Chain reaction theory
C. Radiation hypothesis
D. None of these
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Rate of an autocatalytic chemical reaction is a function of
A. Temperature only
B. Pressure only
C. Composition only
D. All of the above
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The role of a catalyst in a chemical reaction is to change the
A. Equilibrium constant
B. Activation energy
C. Final products
D. Heat of reaction
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Pick out the correct statement.
A. A chemical reaction accompanied by absorption of heat is called an exothermic reaction
B. A chemical reaction accompanied by evolution of heat is called an endother-mic reaction
C. The rate constant for a first order reaction does not change on changing the concentration units
D. Chemical equilibrium state is dynamic in nature
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A liquid decomposes by irreversible first order kinetics and the half life period of this reaction is 8 minutes. The time required for 75% conversion of the liquid will be __________ minutes.
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Design of heterogeous catalytic reactor involves consideration of __________ steps.
A. Only chemical
B. Only physical
C. Both A & B
D. Neither A nor B
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Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction.
A. Elementary
B. Parallel
C. Consecutive
D. None of these
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Which of the following factors control the design of a fluid-solid reactor?
A. Reaction kinetics for single particle,
B. Size distribution of solids beingtreated
C. Flow patterns of solids and fluid in the reactor
D. All of the above
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Pick out the wrong statement.
A. The integral method of analysing kinetic data is used when the data is scattered
B. The differential method of analysing kinetic data requires more accurate or larger amounts of data
C. When the reaction rate is independent of temperature, the reaction is said to be of zero order
D. The ratio of volumes of plug flow reactor to that of mixed reactor is always less than one for identical feed composition, flow rate, conversion and for all positive reaction orders
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For the reversible reaction A ⇋ 2B, if the equilibrium constant K is 0.05 mole/litre; starting from initially 2 moles of A and zero moles of B, how many moles will be formed at equilibrium?
A. 0.253
B. 0.338
C. 0.152
D. 0.637
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The importance of diffusion in a catalyst are increased by
A. Large catalyst particle size
B. An active surface of the catalyst
C. Small pore diameter
D. All of the above
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In a semi-batch reactor
A. Velocity of reaction can be controlled
B. Maximum conversion can be controlled
C. Both the reactants flow counter-currently
D. Residence time is constant
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In autocatalytic reactions,
A. One of the reactants acts as a catalyst
B. One of the products acts as a catalyst
C. Catalysts have very high selectivity
D. No catalyst is used
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In case of a P.F.R., there
A. May be lateral mixing of fluid
B. Should not be any mixing along the flow path
C. Both A and B
D. Neither A nor B
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Equilibrium of a chemical reaction as viewed by kinetics is a __________ state.
A. Dynamic steady
B. Static steady
C. Dynamic unsteady
D. None of these
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Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature?
A. Pore diffusion
B. Film diffusion
C. Ash layer diffusion
D. Chemical reaction
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A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are
A. Equal in size
B. Of different sizes
C. Of such size that the ratio of their volumes is < 5
D. None of these
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Pick out the correct statement.
A. A catalyst speeds up the forward reaction but slows shown the reverse reaction
B. Addition of catalyst changes the equilibrium constant
C. Pressure changes do not change the equilibrium concentrations
D. The composition of equilibrium is changed by catalyst
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For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of
A. Ideal plug flow
B. Bypass
C. Dead zone
D. Chanelling
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The increase in the rate of reaction with temperature is due to
A. Increase in the number of effective collisions
B. Decrease in activation energy
C. Increase in the average kinetic energy of the reacting molecules
D. None of these
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