Chemical Reaction Engineering The half life period of a first order reaction is Proportional to the initial concentration of reactants Half the specific rate constant Dependent on initial concentration of the reactants Always the same irrespective of the reaction Proportional to the initial concentration of reactants Half the specific rate constant Dependent on initial concentration of the reactants Always the same irrespective of the reaction ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Brunaur, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation? The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer (except the first one) is involved in each of the evaporation process None of these Langmuir There is no dynamic equilibrium between successive layer The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer (except the first one) is involved in each of the evaporation process None of these Langmuir There is no dynamic equilibrium between successive layer ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor? Very high temperature should be used throughout the reaction None of these Temperature should be high in the beginning and decreased towards the end of the reaction Very low temperature should be used throughout the reaction Very high temperature should be used throughout the reaction None of these Temperature should be high in the beginning and decreased towards the end of the reaction Very low temperature should be used throughout the reaction ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The dimensions of rate constant for reaction 3A → B are (l/gm mole)/min. Therefore the reaction order is 1 2 3 1 2 3 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering On application of pressure to the equilibrium system, ice ⇋ water; which of the following phenomenon will occur? Water will evaporate Equilibrium will not be attained More water will be formed More ice will be formed Water will evaporate Equilibrium will not be attained More water will be formed More ice will be formed ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ? Smaller reactor followed by larger one Large reactor followed by smaller one Data insufficient, can Either of the arrangement A or B will give the same yield Smaller reactor followed by larger one Large reactor followed by smaller one Data insufficient, can Either of the arrangement A or B will give the same yield ANSWER DOWNLOAD EXAMIANS APP
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