Chemical Reaction Engineering GATE-1992

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Q 1: A gaseous reaction A → 2B + C takes place isothermally in a constant-pressure reactor. Starting with a gaseous mixture containing 50 % A (rest inerts), the ratio of final to initial volume is found to be 1.6. The percentage conversion of A is





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Q 2:  The conversion of a reactant, undergoing a first-order reaction, at a time equal to three- times the half-life of the reaction is





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Q 3: The units of frequency factor in Arrhenius equation





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Fill in the Blanks Q 4 & 5:

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Q 4: Transition state theory approaches the problem of calculating reaction rates by concentrating on the idea of______.

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Q 5 In a first-order reaction (A → Products) the reaction becomes slower as it proceeds, because the concentration of A _________, and the rate is _______.

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Q 6: A homogeneous liquid phase reaction

A\rightarrow R;\;\;-r_A=kC_A^2

takes place with 50 % conversion in a well-mixed reactor operating isothermally. What will be the conversion if the reactor is replaced by a plug flow type of equal size all else remaining the same?

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Q 7: Consider the set -of elementary reactions

A\xrightarrow{k_1}B
A+B\xrightarrow{k_2}C
A+D\xrightarrow{k_3}2E

At time t = 0, a batch reactor is filled with a mixture of A and D. What is the relation between the concentrations of B and D after a time t?

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