Q.1
A catalyst inhibitor
Q.2
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.)
Q.3
Holding time for flow reactors is __________ the space time, for constant fluid density
Q.4
At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?
Q.5
Chemical reaction rate of a component depends upon the
Q.6
6 gm of carbon is burnt with an amount of air containing 18 gm oxygen. The product contains 16.5 gms CO₂ and 2.8 gms CO besides other constituents. What is the degree of conversion on the basis of disappearance of limiting reactant?
Q.7
Signal normally used to study non-ideal flow by stimulus response technique is __________ input.
Q.8
A multiple reaction may be classified as a __________ reaction.
Q.9
Reverse reaction in a chemical equilibrium is favoured by the
Q.10
Rate determining step in a reaction consisting of a number of steps in series is the __________ step.
Q.11
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
Q.12
Rate of a chemical reaction is not affected by the
Q.13
The reason why a catalyst increases the rate of reaction is that, it
Q.14
A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length
Q.15
If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is
Q.16
Transition state theory relates the above quantities as
Q.17
Velocity of a chemical reaction
Q.18
Helium-mercury method is used for the measurement of the __________ of the catalyst.
Q.19
Sum of the powers of the concentration terms in the rate equation is called the __________ of the reaction.
Q.20
If in the gaseous phase reaction, N₂O₄ ⇋ 2NO₂, x is the part of N₂O₄ which dissociates, then the number of molecules at equilibrium will be
Q.21
Kinetics of a catalytic reaction can be best studied on a/an __________ reactor.
Q.22
Semibatch reactor is preferred, when a/an
Q.23
__________ catalytic reaction is involved in the thermal cracking of gas oil.
Q.24
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.
Q.25
Which of the following will favour the reverse reaction in a chemical equilibrium reaction?
Q.26
The value of 'n' for a chemical reaction A → B, whose reaction rate is → CAn, will be __________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled.
Q.27
The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is fed to the reactor at the rate of 0.01 m³ /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k)is (Data: Heat of reaction at 298 K = - 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100kJ/kmole. K (may be assumed to be independent of temperature))
Q.28
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
Q.29
In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will
Q.30
The extent of a reaction is
Q.31
A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction.
Q.32
For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor.
Q.33
Fluidised bed reactor is characterised by
Q.34
A batch reactor is characterised by
Q.35
In a continuous flow stirred tank reactor, the composition of the exit stream
Q.36
In the reversible reaction of the type, A + B ⇋ AB, in general
Q.37
Variables affecting the rate of homogeneous reactions are
Q.38
The concentration of A in a first order reaction, A → B, decreases
Q.39
A second order reaction of the form A + B → C is called a pseudo-first order reaction, when
Q.40
The heat of reaction
Q.41
For a homogeneous reaction of nth order, the dimension of the rate constant is given by
Q.42
Slurry reactors are characterised by the
Q.43
Sulphuric acid is used as a catalyst in the
Q.44
From collison theory, the reaction rate constant is proportional to
Q.45
In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.
Q.46
Arrhenious equation represents graphically the variation between the __________ and temperature.
Q.47
For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single
Q.48
The half life period of a first order reaction is
Q.49
Space time in flow reactor is
Q.50
Space velocity
0 h : 0 m : 1 s