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Chemical Reaction Engineering

Chemical Reaction Engineering
The vessel dispersion number (D/μL) for plug flow is

750
500
∞

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Chemical Reaction Engineering
The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is

PFR in series
Series of CSTR
Backmix reactor
Plug flow reactor

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Chemical Reaction Engineering
In which of the following gaseous phase reversible reactions, the product yield can not be increased by the application of high pressure?

2SO₂ + O₂ ⇋ 2SO₃
N₂ + O₂ ⇋ 2NO
PCl3 + Cl₂ ⇋ PCl5
N + 3H₂ ⇋ 2NH₃

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Chemical Reaction Engineering
For identical flow rate, feed composition and for elementary first order reactions, 'N' equal sized mixed reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for constant density systems. This is true, when the value of 'N' is

1
∞
>1
≥1

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Chemical Reaction Engineering
The rate of a gas phase reaction is given by K . CA . CB. If the volume of the reaction vessel is reduced to l/4th of its initial volume, then the reaction rate compared to the original rate will be __________ times.

8
4
16
2

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Chemical Reaction Engineering
With an increase in pressure in gaseous phase chemical reactions, the fractional conversion __________ when the number of moles decreases.

Remains unaffected
Unpredictable from the data
Increases
Decreases

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