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The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of _______________ order?
Related MCQs
An endothermic aqueous phase first order irreversible reaction is carried out in an adiabatic plug flow reactor. The rate of reaction ?
Which of the following factors control the deactivation of a porous catalyst pellet?
Carbon particles accumulated on the catalyst used in the gas oil cracking lies in the category of __________ poison?
For an ideal plug flow reactor, the value of Peclet number is__________?
In a reversible reaction, a catalyst increases the rate of forward reaction__________?
In an ideal mixed reactor (at steady state), the __________?
The importance of diffusion in a catalyst are increased by __________?
A gaseous reactant is introduced in a mixed reactor of 3 litres volume at the rate of 1 litre/second. The space time is __________ seconds?
With increase in initial concentration, the fractional conversion of a first order reaction in a given time__________?
The molecularity and the order of reaction respectively, for the hydrolysis of methyl acetate in presence of acids are__________?
Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature ?
The temperature dependence of reaction rate constant (K) by Arrhenius law is given by__________?
In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for__________?
Half-life period for a first order reaction is __________ the initial concentration of the reactant?
Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in __________ in conversion?
In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same ?
Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the __________?
Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction?
The eddy diffusivity for a liquid in plug flow must be__________?
In which of the following gaseous phase reversible reactions, the product yield cannot be increased by the application of high pressure ?
In a/an __________ vessel, the fluid enters and leaves following plug flow?
If the pore diffusion controls in a catalytic reaction, the apparent activation energy Ea is equal to__________?
When an exothermic reversible reaction is conducted adiabatically, the rate of reaction__________?
Reactions with high activation energy are__________?
The conversion in a mixed reactor/accomplishing a reaction A → 3R is 50% when gaseous reactant ‘A’ is introduced at the rate of 1 litre/second and the leaving flow rate is 2 litres/second. The holding time for this operation is __________ second?
A Catalyst __________?
For a mixed flow reactor operating at steady state, the rate of reaction is given by__________?
With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion)?
The rate of the heterogeneous catalytic reaction A(g) + B(g) → C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction is__________?
The rate equation for the reaction represented by as shown in the bellow figure, is given by – rx = K1 . Cx/(1 + K2 Cx). At high value of Cx (i.e.., K2Cx > > 1), the order of the reaction and the rate constant are respectively__________?
What is the dispersion number for a plug flow reactor ?
Transition state theory gives the rate constant as__________?
In case of a/an __________ chemical reaction, conversion increases with the rise in temperature?
The synthesis of proteins and metabolism in biological objects occur in the presence of biocatalyst called__________?
From collision theory, the reaction rate constant is proportional to__________?
The unit of frequency factor in Arrhenius equation is__________?
The ratio of moles of a reactant converted into the desired product to that converted into unwanted product is called__________?
Space time equals the mean residence time__________?
Chemical reaction rate of a component depends upon the__________?
If helium is introduced in a reactor containing O2, SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 (as per Le Chatelier’s principle)?
For a first order reaction carried out in a plug flow reactor, the space time is__________?
With increase in K2/K1 in case of a unimolecular type elementary reactions as shown in the bellow figure, the fractional yield of ‘R’ in mixed reactor (for a given conversion of ‘A’) ?
A space time of 3 hours for a flow reactor means that__________?
For a reaction of the type of bellow given figure, the rate of reaction (- rx) is given by__________?
A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A → R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given: CA0= 5 kmole/m3; XA = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min-1; (ΔH) = – 40kJ/mole; ρ = 1000kg/m3 CP = 4 J/gm.°C ; q = 10-3 m3/min (ρ and CP are same for the reactant and product streams). The amount of heat to be removed is__________?
If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship ?
A reactor is generally termed as an autoclave, when it is a__________?
For an autocatalytic reactor, the suitable reactor set up is__________?
Which of the following factors control the design of a fluid-solid reactor ?
__________ explains the mechanism of catalysis?
If Thiele modulus is __________, then the pore diffusion resistance in a catalyst may be considered as negligible?
The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of _______________ order?
A. Zero
B. First
C. Second
D. None of these
Correct Answer:
Second
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Last Updated:
February 23, 2019