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 (A) Equal in size (B) Of different sizes (C) Of such size that the ratio of their volumes is < 5 (D) None of these

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
(A) Equal in size
(B) Of different sizes
(C) Of such size that the ratio of their volumes is < 5
(D) None of these
by

1 Answer

Answer :

(A) Equal in size
by

Related questions

With the same reaction time, initial concentration and feed rate, the reaction 2A → B is carried out separately in CSTR and P.F. reactor of equal volumes. The conversion will be (A) Higher in P.F. reactor (B) Higher in CSTR (C) Same in both the reactors (D) Data insufficient; can't be predicted

Description : With the same reaction time, initial concentration and feed rate, the reaction 2A → B is carried out separately in CSTR and P.F. reactor of equal volumes. The conversion will be (A) Higher in P.F. reactor (B) Higher in CSTR (C) Same in both the reactors (D) Data insufficient; can't be predicted

Last Answer : (A) Higher in P.F. reactor

Pick out the wrong statement. (A) The integral method of analysing kinetic data is used when the data is scattered (B) The differential method of analysing kinetic data requires more accurate or larger amounts of data (C) When the reaction rate is independent of temperature, the reaction is said to be of zero order (D) The ratio of volumes of plug flow reactor to that of mixed reactor is always less than one for identical feed composition, flow rate, conversion and for all positive reaction orders

Description : Pick out the wrong statement. (A) The integral method of analysing kinetic data is used when the data is scattered (B) The differential method of analysing kinetic data requires more accurate ... less than one for identical feed composition, flow rate, conversion and for all positive reaction orders

Last Answer : (C) When the reaction rate is independent of temperature, the reaction is said to be of zero order

Pick out the wrong statement pertaining to space velocity of flow reactors. (A) The unit of space velocity is (time) -1 (B) The space velocity of 3 hr -1 means that three reactor volumes of feed at specified conditions are being fed into the reactor every hour (C) The space velocity of 3 hr -1 means that one third reactor volume of feed at specified conditions are being fed into the reactor (D) None of these

Description : Pick out the wrong statement pertaining to space velocity of flow reactors. (A) The unit of space velocity is (time) -1 (B) The space velocity of 3 hr -1 means that three reactor volumes of ... one third reactor volume of feed at specified conditions are being fed into the reactor (D) None of these

Last Answer : (C) The space velocity of 3 hr -1 means that one third reactor volume of feed at specified conditions are being fed into the reactor

N' plug flow reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for __________ order reactions. (A) First (B) Second (C) Third (D) Any

Description : N' plug flow reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for __________ order reactions. (A) First (B) Second (C) Third (D) Any

Last Answer : (D) Any

For all positive reaction orders for a particular duty, (A) Mixed reactor is always larger than the plug-flow reactor (B) Ratio of the volume of the mixed reactor to that of the plug-flow reactor decreases with order (C) Reactor size is independent of the type of flow (D) Density variation during reaction affects design

Description : For all positive reaction orders for a particular duty, (A) Mixed reactor is always larger than the plug-flow reactor (B) Ratio of the volume of the mixed reactor to that of the plug-flow ... (C) Reactor size is independent of the type of flow (D) Density variation during reaction affects design

Last Answer : (A) Mixed reactor is always larger than the plug-flow reactor

. A first order irreversible reaction, A → B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that __________ in the two reactors. (A) Both conversion as well as concentration are same (B) Conversion in both will be the same but concentrations will be different (C) Both the conversion as well as concentrations will be different (D) None of these

Description : . A first order irreversible reaction, A → B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that __________ in the two ... be different (C) Both the conversion as well as concentrations will be different (D) None of these

Last Answer : (B) Conversion in both will be the same but concentrations will be different

For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single (A) CSTR of volume V (B) PFR of volume V (C) CSTR of volume V/X (D) PFR of volume V/X

Description : For identical flow rate and feed composition, X plug flow reactors (PER) in series with a total volume V gives the same conversion as single (A) CSTR of volume V (B) PFR of volume V (C) CSTR of volume V/X (D) PFR of volume V/X

Last Answer : (B) PFR of volume V

Equal volumes of two monoatomic gases, A and B, at same temperature and pressure are mixed. The ratio of specific heats (Cp /Cv ) of the mixture will be (1) 1.67 (2) 0.83 (3) 1.50 (4) 3.3

Description : Equal volumes of two monoatomic gases, A and B, at same temperature and pressure are mixed. The ratio of specific heats (Cp /Cv ) of the mixture will be (1) 1.67 (2) 0.83 (3) 1.50 (4) 3.3

Last Answer : (1) 1.67

The sequence in which three CSTR's of volumes 5, 10 and 15 m3 will be connected in series to obtain the maximum production in a second order irreversible reaction is (A) 15, 10, 5(B) 5, 10, 15 (C) 10, 5, 15 (D) 10, 15, 5

Description : The sequence in which three CSTR's of volumes 5, 10 and 15 m3 will be connected in series to obtain the maximum production in a second order irreversible reaction is (A) 15, 10, 5 (B) 5, 10, 15 (C) 10, 5, 15 (D) 10, 15, 5

Last Answer : (A) 15, 10, 5

If the performance of diesel engine of different sizes, cylinder dimensions and power rating are to be compared, which of the following parameters can be used for such comparison? (a) Swept volume (b) Air fuel ratio (c) Specific brake fuel consumption (d) Volumetric efficiency

Description : If the performance of diesel engine of different sizes, cylinder dimensions and power rating are to be compared, which of the following parameters can be used for such comparison? (a) Swept volume (b) Air fuel ratio (c) Specific brake fuel consumption (d) Volumetric efficiency

Last Answer : Ans :c

Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely miscible. It means that the aniline point of the diesel is __________ the room temperature. (A) More than (B) Less than (C) Same as (D) Either more or less; depends on the room temperature

Description : Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely miscible. It means that the aniline point of the diesel is __________ the room temperature. (A) ... (B) Less than (C) Same as (D) Either more or less; depends on the room temperature

Last Answer : (C) Same as

The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is: (A) ∞(B) 0 (C) 1 (D) > 1

Description : The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is: (A) ∞ (B) 0 (C) 1 (D) > 1

Last Answer : (C) 1

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). (A) Increases (B) Decreases (C) Remain same (D) Increases linearly

Description : 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). (A) Increases (B) Decreases (C) Remain same (D) Increases linearly

Last Answer : (A) Increases

“The total volume of a mixture of non-reacting gases is equal to the sum of the partial volumes.” This statement is known as ______.  A. Law of Dulong and Petit  B. Maxwell-Boltzmann law  C. Amagat’s law  D. Avogadro’s law

Description : “The total volume of a mixture of non-reacting gases is equal to the sum of the partial volumes.” This statement is known as ______.  A. Law of Dulong and Petit  B. Maxwell-Boltzmann law  C. Amagat’s law  D. Avogadro’s law

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Two samples of `HCl` of `1.0 M` and `0.25 M` are mixed. Find volumes of these samples taken in order to prepare `0.75 M HCl` solution. Assume no water

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In flow reactors, the performance equations interrelate the rate of reaction to the (A) Feed rate (B) Reactor volume (C) Extent of reaction (D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

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) d(VCA )/dt = -F (CAF - CA ) - kCA 2V (B) d(VCA )/dt = F (CAF - CA ) - kCA 2V (C) d(VCA )/dt = -FCA - kCA 2V (D) d(VCA )/dt = FCAF - kCA 2V

Description : 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 ... 2V (C) d(VCA )/dt = -FCA - kCA 2V (D) d(VCA )/dt = FCAF - kCA 2V

Last Answer : (D) d(VCA )/dt = FCAF - kCA 2V

To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in (A) Shallow and small piles (B) Fine sizes without the presence of any lump (C) Closed space without any ventilation facility (D) Large heaps with small surface to volume ratio

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Last Answer : (A) Shallow and small piles

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Description : The optimum performance for reactors operating in parallel is obtained when the feed stream is distributed in such a way, that the (A) Space time for each parallel line is same (B) Space time for ... is different (C) Larger reactors have more space time compared to smaller ones (D) None of these

Last Answer : (A) Space time for each parallel line is same

A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length (A) Decreases (B) Increases (C) Is at the highest allowable temperature throughout (D) First increases and then decreases

Description : A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length (A) ... Increases (C) Is at the highest allowable temperature throughout (D) First increases and then decreases

Last Answer : (C) Is at the highest allowable temperature throughout

The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor. (A) Greater than (B) Equal to (C) Smaller than (D) Unpredictable from the data

Description : The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is __________ that of mixed reactor. (A) Greater than (B) Equal to (C) Smaller than (D) Unpredictable from the data

Last Answer : (C) Smaller than

Which of the following statement is correct (a) The maximum size of coarse aggregate should not exceed one fourth of the minimum dimension of the plain concrete member. (b) The maximum size of coarse aggregate should not exceed one fifty of the minimum dimension of the reinforced concrete member (c)The aggregates of 40mm, 20mm and 10mm sizes are commonly used for concrete works (d) All the above

Description : Which of the following statement is correct (a) The maximum size of coarse aggregate should not exceed one fourth of the minimum dimension of the plain concrete member. (b) The maximum size of coarse ... aggregates of 40mm, 20mm and 10mm sizes are commonly used for concrete works (d) All the above

Last Answer : (d) All the above

A space time of 3 hours for a flow reactor means that (A) The time required to process one reactor volume of feed (measured at specified conditions) is 3 hours (B) Three reactor volumes of feed can be processed every hour (C) It takes three hours to dump the entire volume of the reactor with feed (D) Conversion is cent per cent after three hours

Description : A space time of 3 hours for a flow reactor means that (A) The time required to process one reactor volume of feed (measured at specified conditions) is 3 hours (B) Three reactor volumes of feed ... to dump the entire volume of the reactor with feed (D) Conversion is cent per cent after three hours

Last Answer : (A) The time required to process one reactor volume of feed (measured at specified conditions) is 3 hours

Pick out the wrong statemen(A) Autocatalytic reactions are exemplified by microbial fermentation reactions (B) The slowest step has the greatest influence on the overall reaction rate in case of an irreversible series reaction (C) The fractional conversion at any time is same for both the constant as well as the variable volume system in case of an irreversible unimolecular type first order reaction (D) Hydrolysis of ester in presence of alkali or acid is a zero order reaction

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The conversion for a first order liquid phase reaction. A → B in a CSTRis 50%. If another CSTR of the same volume is connected in series, then the % conversion at the exit of the second reactor will be (A) 60 (B) 75 (C) 90 (D) 100

Description : The conversion for a first order liquid phase reaction. A → B in a CSTRis 50%. If another CSTR of the same volume is connected in series, then the % conversion at the exit of the second reactor will be (A) 60 (B) 75 (C) 90 (D) 100

Last Answer : (B) 75

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Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher (A) Melting point, hence can be subjected to higher temperature (B) Density; hence core volume for a given power output would be smaller (C) Resistance to effects of irradiation (D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

Equal volumes of different gases at any definite temperature and pressure have- (1) Equal weights (2) equal masses (3) equal density (4) equal no. of molecules

Description : Equal volumes of different gases at any definite temperature and pressure have- (1) Equal weights (2) equal masses (3) equal density (4) equal no. of molecules

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The radii of two cylinders of the same height are in the ratio 4 :5, then find the ratio of their volumes. -Maths 9th

Description : The radii of two cylinders of the same height are in the ratio 4 :5, then find the ratio of their volumes. -Maths 9th

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The radii of two cylinders of the same height are in the ratio 4 :5, then find the ratio of their volumes. -Maths 9th

Description : The radii of two cylinders of the same height are in the ratio 4 :5, then find the ratio of their volumes. -Maths 9th

Last Answer : Let r1 and r2 be radii of two cyclinder and V1, V2 be their volume . Let h be height of the two cyclinders, then V1 = πr2h and V2 = πr22h ∴ V1 / V2 = πr12h / πr22h = r12 / r22 = 16 / 25 .

The radii of two cylinders are in the ratio of 2 : 3 and their heights are in the ratio of 5 : 3. The ratio of their volumes is -Maths 9th

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The radii of two cylinders are in the ratio of 2 : 3 and their heights are in the ratio of 5 : 3. The ratio of their volumes is -Maths 9th

Description : The radii of two cylinders are in the ratio of 2 : 3 and their heights are in the ratio of 5 : 3. The ratio of their volumes is -Maths 9th

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If the radii of the two spheres is 5 8 what is the ratio of their volumes?

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Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than (A) One diameter of thinner bar (B) One diameter of thicker bar (C) Twice the diameter of thinner bar (D) None of these

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For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance. (A) Film diffusion (B) Diffusion through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)

Description : For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the ... through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)

Last Answer : (C) Chemical reaction

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. (A) Film diffusion (B) Diffusion through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)

Description : 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, ... through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)

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Does the Samsung LED Series 6 TV come in different sizes and is it considered a smart TV?

Description : Does the Samsung LED Series 6 TV come in different sizes and is it considered a smart TV?

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Gas turbine cycle consists of  (a) two isothermals and two isentropics  (b) two isentropics and two constant volumes  (c) two isentropics, one constant volume and one constant pressure  (d) two isentropics and two constant pressures  (e) none of the above.

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Last Answer : Answer : d

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Description : Brayton cycle consists’ of following four processes  (a) two isothermals and two isentropics  (b) two isentropics and two constant volumes  (c) two isentropics, one constant volume and one constant pressure  (d) two isentropics and two constant pres-sures  (e) none of the above.

Last Answer : Answer : d

Diesel cycle consists of following four processes  (a) two isothermals and two isentropics  (b) two isentropics, and two constant volumes.  (c) two isentropics, one constant volume and one constant pressure  (d) two isentropics and two constant pressures  (e) none of the above.

Description : Diesel cycle consists of following four processes  (a) two isothermals and two isentropics  (b) two isentropics, and two constant volumes.  (c) two isentropics, one constant volume and one constant pressure  (d) two isentropics and two constant pressures  (e) none of the above.

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Otto cycle consists of following four processes  (a) two isothermals and two isentropics  (b) two isentropics and two constant volumes  (c) two isentropics, one constant volume and one constant pressure  (d) two isentropics and two constant pres-sures  (e) none of the above.

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Last Answer : Answer : b

Given figure is showing spirogram of pulmonary volumes and capacities Which represent expiratory reserve volume `:-`

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Last Answer : Given figure is showing spirogram of pulmonary volumes and capacities Which represent expiratory reserve volume `:-` A. A B. B C. C D. D

Pick up the incorrect statement from the following: (A) No deduction is made for the volume occupied by reinforcement (B) No deduction is made for the openings upto 0.1 sq.m (C) No deduction is made for volumes occupied by pipes, not exceeding 100 sq.cm in crosssection (D) None of these

Description : Pick up the incorrect statement from the following: (A) No deduction is made for the volume occupied by reinforcement (B) No deduction is made for the openings upto 0.1 sq.m (C) No deduction is made for volumes occupied by pipes, not exceeding 100 sq.cm in crosssection (D) None of these

Last Answer : (D) None of these

The assumption on which the trapezoidal formula for volumes is based, is (A) The end sections are parallel planes (B) The mid-area of a pyramid is half the average area of the ends (C) The volume of the Prismoidal is over-estimated and hence a Prismoidal correction is applied (D) All the above

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Last Answer : (D) All the above

The volume of a gas is directly proportional to the number of molecules of the gas.  a. Ideal gas law  b. Boyle-Mariotte Law  c. Avogadro’s Hypothesis  d. Gay-Lussac’s Law of combining Volumes

Description : The volume of a gas is directly proportional to the number of molecules of the gas.  a. Ideal gas law  b. Boyle-Mariotte Law  c. Avogadro’s Hypothesis  d. Gay-Lussac’s Law of combining Volumes

Last Answer : Avogadro’s Hypothesis