Related Questions

With increase in temperature, the equilibrium conversion of a reversible exothermic reaction
A Decreases
B Increases
C Remains unaffected
D Decreases linearily with temperature
When an exothermic reversible reaction is conducted adiabatically, the rate of reaction
A Continuously increases
B Continuously decreases
C Passes through a maximum
D Passes through a minimum
The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to
A d
B $$\sqrt {\text{d}} $$
C d1.5
D d2
A typical example of an exothermic reversible reaction conducted at high pressure in industry is
A Dehydration of ethanol
B Methanol synthesis
C Reformation of methane
D Polymerisation of ethylene
Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor?
A Temperature should be high in the beginning and decreased towards the end of the reaction
B Very low temperature should be used throughout the reaction
C Very high temperature should be used throughout the reaction
D None of these
For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.
A Fixed
B Fluidised bed reactor followed by a fixed
C Fixed bed reactor followed by a fluidised
D Fluidised
With an increase in pressure in gaseous phase chemical reactions, the fractional conversion __________ when the number of moles decreases.
A Increases
B Decreases
C Remains unaffected
D Unpredictable from the data
Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are
A Air to open valve with the controller direct acting
B Air to close valve with the controller indirect acting
C Air to open valve with the controller indirect acting
D Air to close valve with the controller direct acting
An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature.
A Is always equal to
B Is always greater than
C Is always less than
D May be greater or less than
For the non catalytic reaction of particles with surrounding fluid, the same needed to achive the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance.
A Film diffusion
B Diffusion through ash layer
C Chemical reaction
D Either A, B or C

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