Q.1
The decomposition of A into B is represented by the exothermic reaction, A ⇋ 2B. To achieve maximum decomposition, it is desirable to carry out the reaction.
Q.2
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
Q.3
Reactions with high activation energy are
Q.4
Half life period of a first order irreversible reaction A → B is
Q.5
Which of the following is an autocatalytic reaction?
Q.6
The energy of activation of a chemical reaction
Q.7
Backmixing is most predominant in
Q.8
Pick out the wrong statement.
Q.9
When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value.
Q.10
The importance of diffusion in a catalyst are increased by
Q.11
In a semi-batch reactor
Q.12
In a chemical reaction, __________ are conserved.
Q.13
A reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
Q.14
The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are
Q.15
In a semi-batch reactor,
Q.16
Which of the following is not endothermic in nature?
Q.17
For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance.
Q.18
For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a
Q.19
Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about __________ minutes.
Q.20
Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature?
Q.21
The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.
Q.22
An endothermic second order reaction is carried out in an adiabatic plug flow reactor. The rate of heat generation is
Q.23
In autocatalytic reactions,
Q.24
In case of a P.F.R., there
Q.25
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)
Q.26
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
Q.27
Ionic reactions occur in
Q.28
Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the
Q.29
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.
Q.30
Which of the following is not a theory of homogeneous reaction?
Q.31
Rate of an autocatalytic chemical reaction is a function of
Q.32
The rate of reaction does not decrease appreciably as the reaction proceeds in case of __________ reactions.
Q.33
With increase in temperature, the equilibrium __________ rises in case of endothermic reaction.
Q.34
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
Q.35
Pick out the correct statement.
Q.36
Design of heterogeous catalytic reactor involves consideration of __________ steps.
Q.37
In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO₂ to SO₃ is accomplished by a __________ reaction.
Q.38
For the chemical reaction X → Y, it is observed that, on doubling the concentration of 'X', the reaction rate quadruples. If the reaction rate is proportional to Cxn, then what is the value of 'n' ?
Q.39
Pick out the wrong statement.
Q.40
Equilibrium of a chemical reaction as viewed by kinetics is a __________ state.
Q.41
Autocatalytic reactions are best carried out in a
Q.42
In Langmuir treatment of adsorption,
Q.43
In case of __________ reactions, the reaction rate does not decrease appreciably as the reaction proceeds.
Q.44
In the gaseous phase ammonia formation reaction (N₂ + 3H₂ ⇋ 2NH₃), the value of the equilibrium constant depends on the
Q.45
When the reaction is dominated by in-traparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as
Q.46
Carbon particles accummulated on the catalyst used in the gas oil cracking lies in the category of __________ poison.
Q.47
The role of a catalyst in a chemical reaction is to change the
Q.48
Pick out the correct statement.
Q.49
Catalyst carriers
Q.50
The use of space time is preferred over the mean residence time in the design of a/an
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