Chemical Reaction Engineering The half life period of a first order reaction is given by (where, K = rate constant. ) 1.5 K 2.5 K 6.93 K 0.693/K 1.5 K 2.5 K 6.93 K 0.693/K ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following is used for calcination of limestone and dolomite in industrial practice? Fluidised bed reactor None of these Fixed bed reactor Moving bed reactor Fluidised bed reactor None of these Fixed bed reactor Moving bed reactor ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst None of these Internal surface area is utilised efficiently Porosity is of less importance Porosity is very important None of these Internal surface area is utilised efficiently Porosity is of less importance Porosity is very important ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by Reaction External mass transfer None of these Diffusion within the pellet Reaction External mass transfer None of these Diffusion within the pellet ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The residence time distribution of an ideal CSTR is 1/τ exp (-t/τ) Τ exp (-t/τ) 1/τ (-t/τ) Exp(-t/τ) 1/τ exp (-t/τ) Τ exp (-t/τ) 1/τ (-t/τ) Exp(-t/τ) ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion. Film Pore None of these Ash layer Film Pore None of these Ash layer ANSWER DOWNLOAD EXAMIANS APP
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