A. Activation energy
B. Equilibrium constant
C. Heat of reaction
D. None of these
Correct Answer: Activation energy ✔
Last Updated: February 23, 2019
Related MCQs
- 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?
- Rate of a chemical reaction is not influenced by the__________?
- The irreversible reaction is a special case of reversible reaction, if the__________?
- For multiple reactions, the flow pattern within the vessel affects the __________?
- A catalyst is said to be a negative catalyst, if it __________?
- The following half life data are available for the irreversible liquid phase reaction A → products. The overall order of reaction is __________?
- The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy?
- The response curve for a step input signal from a reactor is called C-curve. The variance of C-curve in a ‘tanks in series model’ comprising of ‘m’ tanks is equal to __________?
- If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is __________?
- Rate constant ‘k’ and absolute temperature ‘T’ are related by collision theory (for bimolecular) as__________?
- A back mix reactor is__________?
- The increase in the rate of reaction with temperature is due to__________?
- In a consecutive reaction system of the given figure bellow, when E1 is much greater than E2, the yield of B increases with the__________?
- Helium-mercury method can be used to determine the __________ of the catalyst particle?
- Which of the following is the most suitable for very high pressure gas phase reaction ?
- Half life period of a chemical reaction is__________?
- Rate of a gaseous phase reaction is given by the reaction shown in the bellow figure. The unit of rate constant is__________?
- In a continuous flow stirred tank reactor, the composition of the exit stream__________?