A. 4
B. 16
C. 8
D. 2
Correct Answer: 16 ✔
Last Updated: February 20, 2019
Related MCQs
- In a CSTR __________ varies with time ?
- The enzyme which can catalyse the conversion of glucose to ethyl alcohol is __________?
- The rate constant of a reaction depends on the __________?
- The reaction A → B is conducted in an isothermal batch reactor. If the conversion of A increases linearly with holding time, then the order of the reaction is __________?
- The space time is equivalent to the holding time in a steady state mixed reactor for__________?
- For a zero order reaction, the concentration of product increases with the __________?
- The preferred reacting system for oxidation of o-xylene to phthalic anhydride is __________?
- The gas phase reaction 2A ⇌ B is carried out in an isothermal plug flow reactor. The feed consists of 80 mole % A and 20 mole % inerts. If the conversion of A at the reactor exit is 50%, then CA/CA0 at the outlet of the reactor is __________?
- Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor ?
- What is the order of a chemical reaction whose rate is deter-mined by the variation of one concentration term only ?
- When a catalyst increases the rate of chemical reaction, the rate constant__________?
- A reaction which is catalysed by a base is catalysed by all substances which have a tendency to__________?
- If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is__________?
- __________ catalytic reaction is involved in the thermal cracking of gas oil ?
- The residence time distribution of an ideal CSTR is __________?
- Which of the following is not a unit of reaction rate ?
- Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction?
- A batch reactor suffers from following disadvantage ?
- A catalyst inhibitor__________?
- Calcination reaction of limestone (CaCO3 → CaO + CO2) goes to completion in the rotary kiln, because__________?
- Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure ?
- Promoter is added to the catalyst to improve its__________?
- A batch reactor is characterised by __________?
- Concentration of the limiting reactant (with initial concentration of a moles/litre) after time t is (a-x). Then ‘t’ for a first order reaction is given by__________?
- What is the maximum possible value of FR(mole/sec.) ?
- A second order reaction of the form A + B → C is called a pseudo-first order reaction, when__________?
- Pure A in gas phase enters a reactor 50% of this A is converted to B through the reaction, A → 3B. Mole fraction of A in the exit stream is__________?
- A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction?
- For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance?
- A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by__________?
- Decomposition rate of a liquid ‘X’ which decomposes as per the reaction as shown in the bellow figure is given by__________?
- 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 __________?
- Given, 3H2 + CO = CH4 + H2O, KP = 101.84 and, 4H2 + CO2 = CH4 + 2H2O, KP = 101.17 the KP for the reaction CO + H2O = CO2 + H2 is __________?
- Which of the following is not a dimension-less group used in catalysis? (Where, D = dispersion co-efficient, cm2/sec.D1 = diffusion co-efficient; cm2/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm3/sec. V = volume, cm3.) ?
- The conversion XA and residence time data are collected for zero order liquid phase reaction in a stirred tank reactor. Which of the following will be a straight line ?
- For the reaction as shown in the bellow figure, the rate of formation of Z is 0.2 gm mole/litre.hr. What is the rate of disappearance of X in gm mole/litre.hr ?
- The ‘E’ curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt __________?
- Molecularity of an elementary reaction, P + Q → R + S is __________?
- The exit age distribution of a fluid leaving a vessel (denoted by E) is used to study the extent of non-ideal flow in the vessel. The value of ∫∞ 0 E.dt is__________?
- Effectiveness factor E. of a catalyst pellet is defined as, E = (actual rate within pore of the catalyst)/(rate if not snowed by pore diffusion), Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus) __________?
- Photo-chemical reactions occur in presence of __________?
- The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is ?
- The heat of reaction__________?
- Space velocity__________?
- A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction?
- For a __________ order reaction, the units of rate constant and rate of reaction are the same ?
- The conversion for a first order liquid phase reaction. A → B in a CSTR is 50%. If another CSTR of the same volume is connected in series, then the % conversion at the exit of the second reactor will be__________?
- For the same residence time, which one will give the maximum conversion ?
- The effectiveness factor for large value of Thiele modulus [L√(K/D1)] of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm2/second) ?
- ‘Unreacted core model’ represents the reaction involving __________?
- The value of Steric factor ‘P’ in the equation k = PZeE/RT usually ranges from __________?