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Chemical Reaction Engineering

Chemical Reaction Engineering
The half life period of a first order reaction is given by (where, K = rate constant. )

6.93 K
1.5 K
0.693/K
2.5 K

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Chemical Reaction Engineering
Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about __________ minutes.

8
3
4
6

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Chemical Reaction Engineering
Fluid flow in a real packed bed can be approximated as __________ model.

Mixed flow
Tank in series
Plug flow
Dispersion

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Chemical Reaction Engineering
An isothermal aqueous phase reversible reaction, P ⇋ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m³ .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the

1.60
0.80
1.33
2.67

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Chemical Reaction Engineering
The value of steric factor 'P' in the equation k = PZeE/RT usually ranges from

L.l.to 10²
None of these
L.0 to 10⁻⁸
0.1 to 0.9

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Chemical Reaction Engineering
If CA is the quantity of reactants initially present, the quantity left after 'n' half periods will be equal to

(CA)1/2n
(CA)n
(CA)1/n
(1/2)n.CA

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