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 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 keff = (k+ kg)/2 keff = (kkg)1/2 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. Ash layer Film Pore None of these Ash layer Film Pore None of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the Pressure Both A & B Neither A nor B Temperature Pressure Both A & B Neither A nor B Temperature ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The residence time distribution of an ideal CSTR is 1/τ exp (-t/τ) 1/τ (-t/τ) Exp(-t/τ) Τ exp (-t/τ) 1/τ exp (-t/τ) 1/τ (-t/τ) Exp(-t/τ) Τ exp (-t/τ) ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In the converter of the contact process for the manufacture of H₂SO₄ the equilibrium conversion of SO₂ __________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio of SO₂ to air. (i) increases (ii) decreases (i) decreases (ii) increases (i) increases (ii) increases (i) decreases (ii) decreases (i) increases (ii) decreases (i) decreases (ii) increases (i) increases (ii) increases (i) decreases (ii) decreases ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For a tubular flow reactor with uniform concentration and temperature, the independent variable is Diameter Length None of these Time Diameter Length None of these Time ANSWER DOWNLOAD EXAMIANS APP
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