Q. A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (kₑff) is given by

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Q. If Cᴀ is the quantity of reactants initially present, the quantity left after 'n' half periods will be equal to

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Q. The rate controlling step for the heterogeneous irreversible catalytic reaction A(g) + B(g) → C(g) is the surface reaction of absorbed A with absorbed B to give adsorbed C. The rate expression for this reaction can then be written as (where, Kᴀ, Kʙ and Kc are the equilibrium constants and is the rate constant of the rate controlling step.)

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Q. The conversion for a second order, irreversible reaction (constant volume) given below, in batch mode is given by

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Q. A first order homogeneous reaction of the type X → Y → Z (consecutive reaction) is carried out in a CSTR. Which of the following curves respectively show the variation of the concentration of X, Y and Z with time?

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Q. In a chemical reaction given below , it is observed that the
(i) rate of formation of 'P' is doubled on doubling the concentration of 'X'.
(ii) rate of formation of 'P' is quadrupled on doubling the concentration of 'Y'.
(iii) doubling the concentration of 'Z' does not affect the rate of formation of 'P'.
What is the order of the above chemical reaction?

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Q. Transition state theory relates the above quantities as

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Q. For a first order reaction carried out in a plug flow reactor, the space time is

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Q. Second order consecutive irreversible reactions given below 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)?

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Q. A consecutive reaction given below, is characterised by

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Q. Pick the WRONG design guideline for a reactor in which the reactions, A → R (desired) and A → S (undesired) are to take place. The ratio of the reaction rates is as given below .

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Q. In case of a consecutive unimolecular type first order reaction given below, the concentration of component __________ increases continuously with time.

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Q. For the irreversible elementary first order reaction in parallel given below, a plot of Cy Vs. Cz will give a straight line having a slope of

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Q. The equilibrium constant for the reversible reaction given below, is affected by the

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Q. When the reaction is dominated by in-traparticle diffusion, the apparent order of reaction (nᴅ) as measured is related to the true order (n) as

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Q. An elementary liquid phase decomposition reaction given below is to be carried out in a CSTR. The design equation is

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Q. According to Arhenious equation of temperature dependency of rate constant for an elementary reaction

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Q. The order of the following reaction is

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Q. The half life period 't' of a zero order reaction given below, is equal to

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Q. The point selectivity of the product 'Y' in the below reaction, is equal to

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