Chemical Engineering · all questions

Chemical Reaction Engineering
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Q181

A catalyst in a chemical reaction __________ free energy change in the reaction.

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Q182

The rate of a homogeneous reaction is a function of

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Q183

Space time equals the mean residence time

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Q184

An imbalanced chemical reaction equation is against the law of

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Q185

Reverse reaction in a chemical equilibrium is favoured by the

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Q186

For an isothermal second order aqueous phase reaction, A → B, the ratio of the time required for 90% conversion to the time required for 45% conversion is

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Q187

A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A → B. Assume the heat of reaction is - 1kJ/mole at 373°K and heat capacity of both A and B to be constant and equal to 50J/mole.K. The temperature rise after a conversion of 0.5 will be

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Q188

Carrier in a catalyst increases its

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Q189

The dimensions of rate constant for reaction 3A → B are (l/gm mole)/min. Therefore the reaction order is

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Q190

Rate determining step in a reaction consisting of a number of steps in series is the __________ step.

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Q191

For the gaseous reaction 2A → B, where the feed consists of 50 mole % A and 50 mole % inerts, the expansion factor is

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Q192

The exit age distribution curve E(t) for an ideal CSTR with the average residence time,

τ

, is given by

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Q193

With increase in temperature, the equilibrium conversion of a reversible exothermic reaction

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Q194

Arhenious equation shows the variation of __________ with temperature.

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Q195

Chemical reaction rate of a component depends upon the

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Q196

Which of the following is a characteristic of an ideal plug flow reactor?

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Q197

What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction?

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Q198

A pulse tracer is introduced in an ideal CSTR (with a mean residence time ι) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be

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Q199

An irreversible aqueous phase reaction, A + B → P, is carried out in an adiabatic mixed flow reactor. A feed containing 4 kmole/m³ of each A and B enters the reactor at 8 m³/hr. If the temperature of the exit stream is never to exceed 390 K, what is the maximum inlet feed temperature allowed?
(Data: Heat of reaction = -50 kJ/mole, Density of the reacting mixture = 1000 kg/m³, Specific heat of reacting mixture = 2 kJ/kg.K)
The above data can be assumed to be independent of temperature and composition.

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Q200

Pick out the correct statement.

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