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Chemical Reaction Engineering

Chemical Reaction Engineering
A reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.

None of these
Autocatalytic
Catalytic
Photochemical

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Chemical Reaction Engineering
Calcination reaction of limestone (CaCO₃ → CaO + CO₂) goes to completion in the rotary kiln, because

Of high calcination temperature
CaO is not dissociated
CaO is more stable than CaCO₃
CO₂ escapes continuously

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Chemical Reaction Engineering
The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is

8621°K
9210°K
8987°K
8764°K

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Chemical Reaction Engineering
The space time is equivalent to the holding time in a steady state mixed reactor for

Constant fluid density systems
Variable fluid density systems
Non-isothermal gas reaction
Gas reactions with changing no. of moles

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Chemical Reaction Engineering
Which of the following is an autocatalytic reaction?

Ammonia synthesis reaction
Enzyme fermentation reaction
Microbial fermentation reaction
Photochemical reactions

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Chemical Reaction Engineering
Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.

Independent of
Proportional to
Inversely proportional to
Proportional to the square of

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