Limiting reactant in a chemical reaction decides the
In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2 __________ (A) __________ with increase in temperature and __________ (B) __________ with increase in the mole ratio of SO2 to air.
Thermodynamic equilibrium constant in a system is affected by
Molecularity of a reaction
The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.
The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to
The most suitable reactor for carrying out an auto-thermal reaction is a
BET apparatus is used to determine the
Considering the endotheomic dissociation of CaCO3 in a closed vessel (CaCO3 CaO + CO2), the pressure of CO2 increases, if
A catalyst promoter
Promoter is added to the catalyst to improve its
Pick out the wrong statement.
An elementary liquid phase decomposition reaction is to be carried out in a CSTR. The design equation is
In case of a P.F.R., there
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.
An irreversible first order reaction is being carried out in a CSTR and PFR of same volume. The liquid flow rates are same. The relative conversion will
Which of the following chemical reactions will be favoured by low pressure ?
Which of the following is an autocatalytic reaction ?
A balanced chemical reaction equation conforms to the law of
If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is
When a high liquid hold up is required in a reactor for gas liquid reaction, use __________ coloumn.
The energy of activation of a chemical reaction
Chemical kinetics can predict the __________ of a chemical reaction.
Kinetics of a solid catalysed reaction can best be studied in a __________ reactor.
Pick out the correct statement.
The performance of a cascade of CSTR's can be improved by adding
An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature.
In a zero order reaction, reactants concentration does not change with time and the
In an exothermic reaction, the energy of the reacting substances as compared to that of products is
According to Arhenious equation of temperature dependency of rate constant for an elementary reaction
Design of heterogeous catalytic reactor involves consideration of __________ steps.
The equilibrium constant of chemical reaction __________ in the presence of catalyst.
Effectiveness factor (E) of a catalyst pellet is defined as, Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)
The effectiveness factor for large value of Thiele modulus (LK/D1) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm2/second)
A multiple reaction may be classified as a __________ reaction.
Reverse reaction in a chemical equilibrium is favoured by the
For a tubular flow reactor with uniform concentration and temperature, the independent variable is
Space time in flow reactor is
The reactions of high molecularity are rare, because
Which of the following is the most suitable for isothermal operation ?
What is the unit of the rate constant in a chemical reaction in whichof the reactant decomposes in one hour,in two hours,in three hours and so on ?
The order of a chemical reaction is
A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction.
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