A. Very slow
B. Very fast
C. Photochemical
D. Both B. and C.
Correct Answer: D. Both B. and C. ✔
Last Updated: February 19, 2019
Related MCQs
- In case of calcination of limestone, CaCO3 CaO + CO2, the addition of more of CaO will result in __________ in the concentration of CO2?
- The rate of the chemical reaction A → B doubles as the concentration of A i.e.., CA is doubled. If rate of reaction is proportional to CA n, then what is the value of n for this reaction ?
- Arrhenius equation shows the variation of __________ with temperature?
- The rate constant of a chemical reaction increases by increasing the__________?
- What is the dispersion number for a CSTR ?
- Catalyst is a substance, which __________ chemical reaction?
- __________ gas is normally employed in B.E.T. method of finding out the surface area of catalyst?
- The equilibrium constant of a catalytic chemical reaction __________ due to the presence of?
- Following isothermal kinetic data are obtained in a basket type of mixed flow reactor for a porous catalyst. Determine the role of pore diffusion and external mass transfer processes ?
- A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is__________?
- For a first order isothermal chemical reaction in a porous catalyst, the effectiveness factor is 0.3. The effectiveness factor will increase if the__________?
- Batch process is preferred over continuous process, when the__________?
- Rate of a chemical reaction is not affected by the__________?
- On application of pressure to the equilibrium system, ice ⇌ water; which of the following phenomenon will occur ?
- B.E.T. method can be used to determine the __________ of a porous catalyst?
- In an exothermic reaction, the energy of the reacting substances as compared to that of products is__________?
- Semibatch reactor is preferred, when a/an__________?
- The half life period ‘t’ of a zero order reaction as shown in the bellow figure, is equal to__________?
- If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion?
- Variables affecting the rate of homogeneous reactions are__________?
- In a zero order reaction, reactants concentration does not change with time and the__________?
- In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is__________?
- Volume change for unimolecular type first order reaction as shown in the bellow figure, increases __________ with time?
- Brunauer, 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 ?
- An example of autothermal reactor operation is__________?
- A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are__________?
- __________ resistance is not involved in the combustion of a carbon particle?
- The value of ‘n’ for a chemical reaction A → B, whose reaction rate is → CA n, will be __________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled?
- A photochemical reaction is __________ light?
- Participation of __________ is involved in the occurrence of a chemical reaction?
- The first order series reaction as shown in the bellow figure is conducted in a batch reactor. The initial concentrations of A, B and C (CA0, CB0, CC0 respectively) are all non-zero. The variation of CB with reaction time will not show a maximum, if__________?
- In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be __________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume ?