Q.1
In a/an __________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation.
Q.2
In case of a/an __________ chemical reaction, conversion increases with the rise in temperature.
Q.3
The units of frequency factor in Arhenious equation
Q.4
Pick out the wrong statement.
Q.5
Differential method for analysing the kinetic data is used
Q.6
Integral method for analysing the kinetic data is used
Q.7
The rate of the reaction, X → Y, quadruples when the concentration of 'X' is doubled. The rate expression for the reaction is, r = K Cxn, the value of 'n' in this case will be
Q.8
Which of the following is not a chemical step in a fluid solid catalytic reaction?
Q.9
An example of autothermal reactor operation is
Q.10
When a high liquid hold up is required in a reactor for gas liquid reaction, use __________ coloumn.
Q.11
Promoter is added to the catalyst to improve its
Q.12
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 CAn, then what is the value of n for this reaction?
Q.13
Which of the following fixes the volume of a batch reactor for a particular conversion and production rate?
Q.14
The dispersion number of perfect mixed flow is
Q.15
Sometimes, batch process is preferred over continuous process, when the product
Q.16
For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.
Q.17
The performance of a cascade of CSTR's can be improved by adding
Q.18
For identical flow rate, feed composition and for elementary first order reactions, 'N' equal sized mixed reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for constant density systems. This is true, when the value of 'N' is
Q.19
Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.
Q.20
The ratio of moles of a reactant converted into the desired product to that converted into unwanted product is called
Q.21
For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to
Q.22
In which of the following reactions, thee-quilibrium will shift to the right, if the total pressure is increased?
Q.23
The 'E' curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt
Q.24
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?
Q.25
The reactions with low activation energy are
Q.26
Kinetics of a solid catalysed reaction can best be studied in a __________ reactor.
Q.27
For an autocatalytic reactor, the suitable reactor set up is
Q.28
__________ gas is normally employed in B.E.T.method of finding out the surface area of catalyst.
Q.29
If the time required to complete a definite fraction of reaction varies inversely as the concentration of the reactants, then the order of reaction is
Q.30
Pick out the correct statement.
Q.31
The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy.
Q.32
Which of the following is used for calcination of limestone and dolomite in industrial practice?
Q.33
A catalyst loses its activity due to
Q.34
Which of the following resistances is not involved in a gas phase catalytic (gas- solid) reaction?
Q.35
When an exothermic reversible reaction is conducted adiabatically, the rate of reaction
Q.36
For an ideal gas mixture undergoing a reversible gaseous phase chemical reaction, the equilibrium constant
Q.37
The reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
Q.38
Pick out the wrong statement
Q.39
The reactions of high molecularity are rare, because
Q.40
Molecularity of a reaction
Q.41
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
Q.42
The reaction between oxygen and organic material is a/an __________ reaction.
Q.43
Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor?
Q.44
What is the dispersion number for a plug flow reactor?
Q.45
__________ resistance is not involved in the combustion of a carbon particle.
Q.46
Pick out the wrong statement.
Q.47
If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the
Q.48
The reaction in which the rate equation corresponds to a stoichiometric equation, is called a/an __________ reaction.
Q.49
For a first order reaction carried out in a plug flow reactor, the space time is
Q.50
A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m³ and volumetric flow rate 1m³ /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m³ . The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 kmole/m³ , the volume of the mixed flow reactor should be increased by a factor of
0 h : 0 m : 1 s