Q. For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to

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Q. In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for

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Q. Helium-mercury method can be used to determine the __________ of the catalyst particle.

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Q. For the chemical reaction X → Y, it is observed that, on doubling the concentration of 'X', the reaction rate quadruples. If the reaction rate is proportional to Cₓⁿ, then what is the value of 'n' ?

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Q. Chemical reaction rate of a component depends upon the

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Q. In a semi-batch reactor

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Q. The equilibrium constant K of a chemical reaction depends on

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Q. The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the

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Q. Which of the following is not a unit of reaction rate ?

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Q. Brunaur, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation ?

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Q. The sequence in which three CSTR's of volumes 5, 10 and 15 m³ will be connected in series to obtain the maximum production in a second order irreversible reaction is

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Q. With increase in temperature, the equilibrium conversion of a reversible exothermic reaction

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Q. In a CSTR __________ varies with time.

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Q. The following gas phase reactions are carried out isothermally in a CSTR.

A → 2R ; r₁ = k₁pᴀ ;
k₁ = 20 mole/(sec.m³ bar)
A → 3S ; r₂ = k₂ pᴀ ;
k₂ = 40 mole/(sec.m³ .bar)

What is the maximum possible value of Fʀ(mole/sec.) ?

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Q. As the chemical reaction proceeds, the rate of reaction

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Q. Pick out the wrong statement.

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Q. For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single

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Q. Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about __________ minutes.

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Q. For a __________ order reaction, the units of rate constant and rate of reaction are the same.

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Q. In case of staged packed bed reactors carrying out exothermic reaction, use

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