Chemical Reaction Engineering The temperature dependence of reaction rate constant (K) by Arhenius law is given by K α T . e-E/RT K α √T . e-E/RT K α eE/RT K α e-E/RT K α T . e-E/RT K α √T . e-E/RT K α eE/RT K α e-E/RT ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For the liquid phase parallel reactions:R, rR = K?.CA2; E? = 80 KJ/moleS, rS = K?.CA ; E? = 120 KJ/mole The desired product is R. A higher selectivity of R will be achieved, if the reaction is conducted at High temperature in a CSTR Low temperature in a PFR Low temperature in a CSTR High temperature in a PFR High temperature in a CSTR Low temperature in a PFR Low temperature in a CSTR High temperature in a PFR ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Promoter. Atlers the position of equilibrium in a reversible reaction Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals Initiates a chemical reaction and is a catalyst by itself All of these Atlers the position of equilibrium in a reversible reaction Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals Initiates a chemical reaction and is a catalyst by itself All of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are Highly temperature sensitive Insensitive to temperature changes Always irreversible Mostly irreversible Highly temperature sensitive Insensitive to temperature changes Always irreversible Mostly irreversible 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 None of these Reaction Diffusion within the pellet External mass transfer None of these Reaction Diffusion within the pellet External mass transfer ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst Porosity is of less importance None of these Porosity is very important Internal surface area is utilised efficiently Porosity is of less importance None of these Porosity is very important Internal surface area is utilised efficiently ANSWER DOWNLOAD EXAMIANS APP
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