Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in __________ in conversion.

Two outlets of a motor manufacturing company reported that revenue from outlet x in 2013 was down 11 percent from 2012. and revenue from outlet Y in 2013 were up 7 percent from 2012. If total revenue from outlet X & Y in 2013 was up 1 percent from 2012, what is the ratio of revenue from outlet X in 2012 revenue from outlet Y in 2012?

A

1 : 2

B

4: 5

C

1 : 1

D

3: 2

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

A

Be more in CSTR than in PFR

B

Be more in PFR than in CSTR

C

Be same in both cases

D

Depend on the temperature

For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a __________ reactor.

A

Stirred tank

B

Tubular flow

C

Batch

D

Fixed bed

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

Remains same

D

Increases linearly

A first order reaction requires two equal sized CSTR. The conversion is

A

Less when they are connected in series

B

More when they are connected in series

C

More when they are connected in parallel

D

Same whether they are connected in series or in parallel

For an ideal mixed flow reactor (CSTR), the exit age distribution E(t) is given by

A

A dirac delta function

B

A step function

C

A ramp function

D

None of the above

Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are

A

Air to open valve with the controller direct acting

B

Air to close valve with the controller indirect acting

C

Air to open valve with the controller indirect acting

D

Air to close valve with the controller direct acting

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

An isothermal irreversible reaction is being carried out in an ideal tubular flow reactor. The conversion in this case will __________ with decrease in space time.

A

Increase

B

Increase exponentially

C

Decrease

D

Remain unchanged

The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always

A

1

B

>1

C

Equal to the order of reaction

Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in __________ in conversion.

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