Chemical Reaction Engineering In a zero order reaction, reactants concentration does not change with time and the Time for half change is independent of the initial concentration Time for half change is half the time taken for completion of the reaction Time for completion of the reaction is independent of the initial concentration Reaction rate is trebled when the initial concentration is trebled Time for half change is independent of the initial concentration Time for half change is half the time taken for completion of the reaction Time for completion of the reaction is independent of the initial concentration Reaction rate is trebled when the initial concentration is trebled ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Semibatch reactor is preferred, when a/an A highly exothermic reaction is to be controlled Undersirable side reaction (at high concentration of one of the reactants) is to be avoided All of these A gas is to be reacted with liquid (e.g. hydrogenation of fat) A highly exothermic reaction is to be controlled Undersirable side reaction (at high concentration of one of the reactants) is to be avoided All of these A gas is to be reacted with liquid (e.g. hydrogenation of fat) ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following resistances is not involved in a gas phase catalytic (gas- solid) reaction? Surface phenomenon resistance Gas film and pore surface diffusion resistances for products Gas film and pore surface diffusion resistances for reactants Ash resistance Surface phenomenon resistance Gas film and pore surface diffusion resistances for products Gas film and pore surface diffusion resistances for reactants Ash resistance ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering From among the following, choose one which is not an exothermic process. Oxidation of sulphur Ammonia synthesis Methanol synthesis Catalytic cracking Oxidation of sulphur Ammonia synthesis Methanol synthesis Catalytic cracking ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In which of the following gaseous phase reversible reactions, the product yield can not be increased by the application of high pressure? 2SO₂ + O₂ ⇋ 2SO₃ N + 3H₂ ⇋ 2NH₃ N₂ + O₂ ⇋ 2NO PCl3 + Cl₂ ⇋ PCl5 2SO₂ + O₂ ⇋ 2SO₃ N + 3H₂ ⇋ 2NH₃ N₂ + O₂ ⇋ 2NO PCl3 + Cl₂ ⇋ PCl5 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The rate expression for a heterogenous catalytic reaction is given by, - rA = K.KA PA(1 + KA.PA + Kr.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ΔHR and ΔHA are the activation energies of adsorption of R and A) E E + ΔHA - ΔHR ΔHA + ΔHR E + ΔHA E E + ΔHA - ΔHR ΔHA + ΔHR E + ΔHA ANSWER DOWNLOAD EXAMIANS APP
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