Q. In case of a P.F.R., there

View solution

Q. 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.

View solution

Q. If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is

View solution

Q. In a zero order reaction, reactants concentration does not change with time and the

View solution

Q. Promoter is added to the catalyst to improve its

View solution

Q. 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

View solution

Q. When a high liquid hold up is required in a reactor for gas liquid reaction, use __________ coloumn.

View solution

Q. In an exothermic reaction, the energy of the reacting substances as compared to that of products is

View solution

Q. For a tubular flow reactor with uniform concentration and temperature, the independent variable is

View solution

Q. Pick out the wrong statement.

View solution

Q. The extent of a reaction is

View solution

Q. Higher free energy of activation of a chemical reaction (at a given temperature) implies

View solution

Q. Calcination reaction of limestone (CaCO₃ → CaO + CO₂) goes to completion in the rotary kiln, because

View solution

Q. Arhenious equation shows the variation of __________ with temperature.

View solution

Q. When a catalyst increases the rate of chemical reaction, the rate constant

View solution

Q. In which of the following reactions, the equilibrium will shift to the right, if the total pressure is increased?

View solution

Q. The catalyst in a first order chemical reaction changes the

View solution

Q. The dispersion number of perfect mixed flow is

View solution

Q. An irreversible aqueous phase reaction, A + B → P, is carried out in an adiabatic mixed flow reactor. A feed containing 4 kmole/m³ of each A and B enters the reactor at 8 m³ /hr. If the temperature of the exit stream is never to exceed 390 K, what is the maximum inlet feed temperature allowed?

Data:
Heat of reaction = - 50 kJ/mole
Density of the reacting mixture = 1000 kg/m³
Specific heat of reacting mixture = 2 kJ/kg.K

The above data can be assumed to be independent of temperature and composition.

View solution

Q. For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rᴀ₀ is invariant with total pressure. The rate controlling step is

View solution