Chemical Engineering :: Chemical Reaction Engineering
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Second order consecutive irreversible reactions
were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments where the ratio of concentration of B to that of A in the initial feed was less than 0.5, the concentration of B increased first, reached a maximum and then declined with time. However, for all experiments where this concentration ratio was 0.5 or above, concentration of B decreased monotonically with time right from the beginning. What is the ratio of the two rate constants (k1/k2)? -
Pick out the wrong statement.
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There is no correspondence between stoichiometry and the rate equation in case of a/an __________ reaction.
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A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A
B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true? -
Which of the following is used for calcination of limestone and dolomite in industrial practice ?
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An imbalanced chemical reaction equation is against the law of
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Which of the following is a characteristic of an ideal plug flow reactor ?
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Velocity of a reaction depends upon the
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Threshold energy in a reaction is equal to the
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A.
Catalytic activity of enzyme catalysed reactions which is affected by temperature, pH value & chemical agents, is maximum at a temperature of about 45°C.
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B.
Most of the enzyme catalysed reactions involve at least two substrates.
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C.
Enzymes help in increasing the activation energy of the reaction.
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D.
Equilibrium concentrations in enzyme catalysed reactions can be calculated by using the thermodynamic properties of substrates & products.
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A.
Inner catalyst core of radius R/8 does not participate in reaction.
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B.
Inner catalyst core of radius R/2 does not participate in reaction.
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C.
Inner catalyst core of radius 7R/8 does not participate in reaction.
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D.
Effectiveness factor for a zero order reaction can not be 7/8 as it must always be 1.
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