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Chemical Reaction Engineering

Chemical Reaction Engineering
Half life period of decomposition of a liquid 'A' by irreversible first order reaction is 12 minutes. The time required for 75% conversion of 'A' is __________ minutes.

6
12
24
18

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Chemical Reaction Engineering
The following gas phase reactions are carried out isothermally in a CSTR.A → 2R ; r₁ = K₁pA ;K₁ = 20mole/(sec.m³ bar)A → 3S ; r₂ = K₂ pA ;K₂ = 40mole/ (sec.m³ .bar)What is the maximum possible value of FR(mole/sec.) ?

43833
43832
43864
2

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Chemical Reaction Engineering
For a zero order reaction, the concentration of product increases with the

Increase of reaction time
Total pressure
Increase in initial concentration
Decrease in total pressure

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Chemical Reaction Engineering
A stirred tank reactor compared to tubular-flow reactor provides

Higher overall selectivity for a first order consecutive reaction
Permits operation at the optimum temperature for a long reaction time
More uniform operating conditions
All of these

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Chemical Reaction Engineering
A back mix reactor is

Same as plug flow reactor (PFR)
Ideal at very low conversion
Same as ideal stirred tank reactor
Suitable for gas phase reactions

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Chemical Reaction Engineering
Specific rate constant for a second order reaction

Both B and C
Depends on the nature of the reactants
Is independent of temperature
Varies with temperature

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