Chemical Reaction Engineering For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption. Neither A nor B Chemical Physical Both A and B Neither A nor B Chemical Physical Both A and B ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Reaction rate of a first order reaction, which is half completed in 23 minutes will be 0.03 sec⁻¹ 0.03 hr⁻¹ 0.03 min⁻¹ 0.05 min⁻¹ 0.03 sec⁻¹ 0.03 hr⁻¹ 0.03 min⁻¹ 0.05 min⁻¹ ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Sometimes, batch process is preferred over continuous process, when the product Sales demand is fluctuating Both A & B Quality & yield can not be achieved in continuous processes, because of long residence time Neither A nor B Sales demand is fluctuating Both A & B Quality & yield can not be achieved in continuous processes, because of long residence time Neither A nor B 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 + ΔHA - ΔHR ΔHA + ΔHR E E + ΔHA E + ΔHA - ΔHR ΔHA + ΔHR E E + ΔHA ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Catalyst carriers Provide large surface area with a small amount of active material Have very high selectivity Inhibit catalyst poisoning Increase the activity of a catalyst Provide large surface area with a small amount of active material Have very high selectivity Inhibit catalyst poisoning Increase the activity of a catalyst ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In the fluid catalytic cracker (FCC), the cracking reaction is __________ (i) and the regeneration is ____________ (ii) (i) endothermic (ii) enodthermic (i) exothermic (ii) endothermic (i) endothermic (ii) exothermic (i) exothermic (ii) exothermic (i) endothermic (ii) enodthermic (i) exothermic (ii) endothermic (i) endothermic (ii) exothermic (i) exothermic (ii) exothermic ANSWER DOWNLOAD EXAMIANS APP
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