Chemical Reaction Engineering Catalyst carriers Have very high selectivity Inhibit catalyst poisoning Provide large surface area with a small amount of active material Increase the activity of a catalyst Have very high selectivity Inhibit catalyst poisoning Provide large surface area with a small amount of active material Increase the activity of a catalyst ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering 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. Chemical reaction Diffusion through ash layer Either A, B or C Film diffusion Chemical reaction Diffusion through ash layer Either A, B or C Film diffusion ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Fractional conversion __________ for an exothermic reversible chemical reaction, when the temperature is maximum. Decreases Increases Unpredictable from the data Remains unchanged Decreases Increases Unpredictable from the data Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering On application of pressure to the equilibrium system, ice ⇋ water; which of the following phenomenon will occur? Equilibrium will not be attained More ice will be formed Water will evaporate More water will be formed Equilibrium will not be attained More ice will be formed Water will evaporate More water will be formed ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Autocatalytic reactions are best carried out in a Plug flow reactor Recycle reactor CSTR in series CSTR Plug flow reactor Recycle reactor CSTR in series CSTR ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by keff = (k+ kg)/2 keff = (kkg)1/2 1/keff = 1/k + 1/kg keff = k + kg keff = (k+ kg)/2 keff = (kkg)1/2 1/keff = 1/k + 1/kg keff = k + kg ANSWER DOWNLOAD EXAMIANS APP
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