Q. The rate constant of a chemical reaction decreases by decreasing the

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Q. __________ is the response curve for a step input signal from a reactor.

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Q. 'If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the

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Q. For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.

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Q. For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times.

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Q. The single parameter model proposed for describing non-ideal flow is the __________ model.

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Q. A first order reaction requires two equal sized CSTR. The conversion is

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Q. Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

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Q. Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature ?

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Q. For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a

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Q. For a gaseous phase reaction, rate of reaction is equal to K. Cᴀ . Cʙ. If the volume of the reactor is suddenly reduced to 1/4th of its initial volume, then the rate of reaction compared to the original rate will be __________ times.

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Q. In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will

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Q. The catalyst in a second order reversible reaction increases the rate of the forward reaction

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Q. Catalyst carriers

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Q. For the liquid phase zero order irreversible reaction A → B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1 min⁻¹ . What will be the conversion for a PFR with a space velocity of 0.2 min⁻¹ ? Assume that all the other operating conditions are the same for CSTR and PFR.

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Q. A high space velocity means that a given

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Q. In flow reactors, the performance equations interrelate the rate of reaction to the

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Q. When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is

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Q. In an ideal tubular-flow reactor

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Q. At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

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