Chemical Reaction Engineering With increase in initial concentration, the fractional conversion of a first order reaction in a given time Decreases Remains constant Increases Unpredictable Decreases Remains constant Increases Unpredictable ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The half life period of a first order reaction is Proportional to the initial concentration of reactants Always the same irrespective of the reaction Dependent on initial concentration of the reactants Half the specific rate constant Proportional to the initial concentration of reactants Always the same irrespective of the reaction Dependent on initial concentration of the reactants Half the specific rate constant ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The effectiveness factor for large value of Thiele modulus (L√(K/D1)) of a solid catalysed first order reaction is equal to (where, L = length of the reactor, cm, D1 = diffusion co-efficient, cm²/second) L√(K/D1) 1 ∞ 1/(L√(K/D1)) L√(K/D1) 1 ∞ 1/(L√(K/D1)) 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 In case of physical adsorption, the heat of adsorption is of the order of __________ kcal/kg.mole. 100 1000 10000 100000 100 1000 10000 100000 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The fractional volume change of the system for the isothermal gas phase reaction, A 3B , between no conversion and complete conversion is 0.5 2 1 3 0.5 2 1 3 ANSWER DOWNLOAD EXAMIANS APP
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