Chemical Engineering:: Chemical Reaction Engineering

Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and

A. moving mercury and graphite.
B. graphite and moving mercury.
C moving mercury and carbon.
D. moving mercury and crimped steel wire.

The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability ?

A. Lead
B. Copper
C Aluminium
D. Wrought iron

For a heterogeneous catalytic reaction

A. free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction.
B. a relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important.
C the catalyst does not form an intermediate complex with the reactant.
D. the surface of the catalyst does not play an important role during reaction.

The increase in the rate of reaction with temperature is due to

A. increase in the number of effective collisions.
B. decrease in activation energy.
C increase in the average kinetic energy of the reacting molecules.
D. none of these.

A catalyst loses its activity due to

A. loss in surface area of the active component.
B. agglomeration of metal particles caused by thermal sintering of the solid surface.
C covering of the catalytic active sites by a foregin substance.
D. all (a), (b) and (c).

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