ORDERING OF SENTENCES QUIZ

Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

0

1

2

3

TRUE ANSWER : ?
YOUR ANSWER : ?

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.

Second

Any

Third

First

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For a gaseous phase reaction, rate of reaction is equal to K. CA . CB. If the volume of the reactor is suddenly reduced to l/4th of its initial volume, then the rate of reaction compared to the original rate will be __________ times.

16

43846

8

43838

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The conversion for a first order liquid phase reaction. A → B in a CSTR is 50%. If another CSTR of the same volume is connected in series, then the % conversion at the exit of the second reactor will be

100

75

60

90

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The reactions with low activation energy are

Always spantaneous

Slow

Non-spontaneous

Fast

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In a CSTR __________ varies with time.

Both A & B

Concentration

Reaction rate

Neither A nor B

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Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure?

Langmuir adsorption isotherm

Freundlich adsorption isotherm

None of these

Adsorption isobar

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Sometimes, batch process is preferred over continuous process, when the product

Neither A nor B

Both A & B

Sales demand is fluctuating

Quality & yield can not be achieved in continuous processes, because of long residence time

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The response curve for a step input signal from a reactor is called C-curve. The variance of C-curve in a 'tanks in series model' comprising of 'm' tanks is equal to

1/m

√m

m

m²

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With increase in the space time of an irreversible isothermal reaction being carried out in a P.F. reactor, the conversion will

Decrease

Increase

Remain same

Data in insufficient; can't be predicted

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