## There is no correspondence between stoichiometric and the rate equation in case of a/an _____________ reaction?

There is no correspondence between stoichiometric and the rate equation in case of a/an _____________ reaction?

A. Elementary
B. Multiple
C. Autocatalytic
D. Non-elementary

## Specific rate constant for a second order reaction__________________?

Specific rate constant for a second order reaction__________________?

A. Is independent of temperature
B. Varies with temperature
C. Depends on the nature of the reactants
D. Both B. and C.

## A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?

A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?

A. Inner catalyst core of radius R/8 does not participate in reaction
B. Inner catalyst core of radius R/2 does not participate in reaction
C. Inner catalyst core of radius 7R/8 does not participate in reaction
D. Effectiveness factor for a zero order reaction cannot be 7/8 as it must always be 1

## 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________________?

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________________?

A. 1
B. 2
C. 3
D. 4

## Velocity of a reaction depends upon the_________________?

Velocity of a reaction depends upon the_________________?

A. Nature of the reactants
B. Concentration of the reactants
C. Temperature at which the reaction is carried
D. All A., B. and C.

## From among the following, choose one which is not an exothermic process ?

From among the following, choose one which is not an exothermic process ?

A. Methanol synthesis
B. Catalytic cracking
C. Ammonia synthesis
D. Oxidation of sulphur

## A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A → B. Assume the heat of reaction is – 1kJ/mole at 373°K and heat capacity of both A and B to be constant and equal to 50J/mole.K. The temperature rise after a conversion of 0.5 will be ____________?

A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A → B. Assume the heat of reaction is – 1kJ/mole at 373°K and heat capacity of both A and B to be constant and equal to 50J/mole.K. The temperature rise after a conversion of 0.5 will be ____________?

A. 5°C
B. 10°C
C. 20°C
D. 100°C

## The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is________________________?

The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is________________________?

A. Backmix reactor
B. Plug flow reactor
C. Series of CSTR
D. PFR in series

## Pure ethanol vapor is fed to a reactor packed with alumina catalyst, at the rate of 100 kmole / hr. The reactor products comprise: ethylene: 95 kmole / hr, water vapour: 97.5 k mole / hr and diethyl ether: 2.5 kmole/hr. The reactions occuring can be represented by: C2H5OH → C2H4 + H2O 2C2H5OH → C2H5 – O – C2H5 + H2O The percent conversion of ethanol in the reactor is________________?

Pure ethanol vapor is fed to a reactor packed with alumina catalyst, at the rate of 100 kmole / hr. The reactor products comprise: ethylene: 95 kmole / hr, water vapour: 97.5 k mole / hr and diethyl ether: 2.5 kmole/hr. The reactions occuring can be represented by: C2H5OH → C2H4 + H2O 2C2H5OH → C2H5 – O – C2H5 + H2O The percent conversion of ethanol in the reactor is________________?

A. 100
B. 97.5
C. 95
D. 2.5

## ‘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_____________________?

‘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_____________________?

A. Pressure
B. Temperature
C. Both A. & B.
D. Neither A. nor B.