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 = (kkg)1/2 keff = (k+ kg)/2 1/keff = 1/k + 1/kg keff = k + kg keff = (kkg)1/2 keff = (k+ kg)/2 1/keff = 1/k + 1/kg keff = k + kg ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following will give maximum gas conversion? Plug-flow catalytic reactor Fluidised bed reactor Semi-fluidised bed reactor Fixed bed reactor Plug-flow catalytic reactor Fluidised bed reactor Semi-fluidised bed reactor Fixed bed reactor ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering An isothermal aqueous phase reversible reaction, P ⇋ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m³ .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the 1.60 2.67 1.33 0.80 1.60 2.67 1.33 0.80 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Sulphuric acid is used as a catalyst in the None of these Alkylation of hydrocarbons Gas phase oxidation of SO₂ in chamber process Hydrogenation of oils None of these Alkylation of hydrocarbons Gas phase oxidation of SO₂ in chamber process Hydrogenation of oils ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Half life period of a chemical reaction is None of these Half of the residence time of a reaction Half of the space time of a reaction The time required to reduce the concentration of the reacting substance to half its initial value None of these Half of the residence time of a reaction Half of the space time of a reaction The time required to reduce the concentration of the reacting substance to half its initial value ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The concentration of A in a first order reaction, A → B, decreases Linearly with time Logarithmically with time Exponentially with time Very abruptly towards the end of the reaction Linearly with time Logarithmically with time Exponentially with time Very abruptly towards the end of the reaction ANSWER DOWNLOAD EXAMIANS APP
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