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Author name: admin

In this passage the author is trying to

Comprehension, Verbal Ability /
Question: In this passage the author is trying to
[A].

explain the difference between the construction of the two bridges

[B].

describe the way different sections of people like to dress

[C].

explain the variety of ways in which strangers can be treated

[D].

describe how people of different classes behaved when unhappy

Answer: Option D

Explanation:

No answer description available for this question.

In this passage the author is trying to Read More »

Comprehension, Verbal Ability

An irreversible aqueous phase reaction, A + B P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m3 of each A and B enters the reactor at 8m3 /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/moleDensity of the reacting mixture = 1000kg/m3Specific heat of reacting mixture = 2kJ/kg.K The above data can be assumed to be independent of temperature and composition.

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: An irreversible aqueous phase reaction, A + B P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m3 of each A and B enters the reactor at 8m3 /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/moleDensity of the reacting mixture = 1000kg/m3Specific heat of reacting mixture = 2kJ/kg.K The above data can be assumed to be independent of temperature and composition.
[A].

190

[B].

290

[C].

390

[D].

490

Answer: Option B

Explanation:

No answer description available for this question.

An irreversible aqueous phase reaction, A + B P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m3 of each A and B enters the reactor at 8m3 /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/moleDensity of the reacting mixture = 1000kg/m3Specific heat of reacting mixture = 2kJ/kg.K The above data can be assumed to be independent of temperature and composition. Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

A second order liquid phase reaction, A B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: A second order liquid phase reaction, A B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is
[A].

[B].

[C].

[D].

Answer: Option D

Explanation:

No answer description available for this question.

A second order liquid phase reaction, A B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

Consider a reversible exothermic reaction in a plug flow reactor. The maximum and minimum permissible temperatures are Tmax and Tmin respectively. Which of the following temperature (T) profiles will require the shortest residence time to achieve the desired conversion.

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: Consider a reversible exothermic reaction in a plug flow reactor. The maximum and minimum permissible temperatures are Tmax and Tmin respectively. Which of the following temperature (T) profiles will require the shortest residence time to achieve the desired conversion.
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.

Consider a reversible exothermic reaction in a plug flow reactor. The maximum and minimum permissible temperatures are Tmax and Tmin respectively. Which of the following temperature (T) profiles will require the shortest residence time to achieve the desired conversion. Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m3 and volumetric flow rate 1m3 /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m3 . The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 kmole/m3 , the volume of the mixed flow reactor should be increased by a factor of

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m3 and volumetric flow rate 1m3 /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m3 . The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 kmole/m3 , the volume of the mixed flow reactor should be increased by a factor of
[A].

7

[B].

6

[C].

3

[D].

7/3

Answer: Option A

Explanation:

No answer description available for this question.

A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m3 and volumetric flow rate 1m3 /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m3 . The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 kmole/m3 , the volume of the mixed flow reactor should be increased by a factor of Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

An isothermal aqueous phase reversible reaction, P R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP – 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: An isothermal aqueous phase reversible reaction, P R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP – 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is
[A].

0.80

[B].

1.33

[C].

1.60

[D].

2.67

Answer: Option C

Explanation:

No answer description available for this question.

An isothermal aqueous phase reversible reaction, P R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP – 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

For an isothermal second order aqueous phase reaction, A B, the ratio of the time required for 90% conversion to the time required for 45% conversion is

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: For an isothermal second order aqueous phase reaction, A B, the ratio of the time required for 90% conversion to the time required for 45% conversion is
[A].

2

[B].

4

[C].

11

[D].

22

Answer: Option C

Explanation:

No answer description available for this question.

For an isothermal second order aqueous phase reaction, A B, the ratio of the time required for 90% conversion to the time required for 45% conversion is Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of
[A].

ideal plug flow

[B].

bypass

[C].

dead zone

[D].

chanelling

Answer: Option C

Explanation:

No answer description available for this question.

For a packed bed reactor; the presence of a long tail in the residence time distribution curve is an indication of Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering

A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by

CHEMICAL ENGINEERING, Chemical Reaction Engineering /
Question: A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by
[A].

keff = k + kg

[B].

keff = (k+ kg)/2

[C].

keff = (kkg)1/2

[D].

Answer: Option D

Explanation:

No answer description available for this question.

A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by Read More »

CHEMICAL ENGINEERING, Chemical Reaction Engineering