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Chemical Engineering - Chemical Reaction Engineering

Exercise : Chemical Reaction Engineering - Section 6
21.
Pick out the wrong statement.
For a first order consecutive reaction, a tubular flow reactor as compared to a stirred tank reactor provides higher overall selectivity.
For an ideal mixed reactor at steady state, the exit stream has the same composition as fluid within the reactor and the space time is equivalent to holding time for constant density system.
Plug flow reactor (PFR) is always smaller than mixed reactor for all positive reaction orders for a particular duty.
Reaction rate does not decrease appreciably as the reaction proceeds in case of an autocatalytic reaction.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
The first order gas phase reaction is conducted isothermally in batch mode. The rate of change of conversion with time is given by
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
The extent of a reaction is
different for reactants and products.
dimensionless.
depends on the stoichiometric co-efficient.
all of the above.
Answer: Option
Explanation:
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24.
Higher free energy of activation of a chemical reaction (at a given temperature) implies
slower rate of reaction.
higher rate of reaction.
higher equilibrium conversion.
both (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Calcination reaction of limestone (CaCO3 CaO + CO2) goes to completion in the rotary kiln, because
CaO is not dissociated.
CO2 escapes continuously.
of high calcination temperature.
CaO is more stable than CaCO3.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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