Chemical Reaction Engineering The half life period of a first order reaction is Dependent on initial concentration of the reactants Half the specific rate constant Always the same irrespective of the reaction Proportional to the initial concentration of reactants Dependent on initial concentration of the reactants Half the specific rate constant Always the same irrespective of the reaction Proportional to the initial concentration of reactants ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Semibatch reactor is preferred, when a/an All of these Undersirable side reaction (at high concentration of one of the reactants) is to be avoided A highly exothermic reaction is to be controlled A gas is to be reacted with liquid (e.g. hydrogenation of fat) All of these Undersirable side reaction (at high concentration of one of the reactants) is to be avoided A highly exothermic reaction is to be controlled A gas is to be reacted with liquid (e.g. hydrogenation of fat) ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is 0 1 3 2 0 1 3 2 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A pulse tracer is introduced in an ideal CSTR (with a mean residence time ι) at time, t = 0. The time taken for the exit concentration of the tracer to reach half of its initial value will be τ/0.693 0.693τ 0.5τ 2τ τ/0.693 0.693τ 0.5τ 2τ ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The rate at which a chemical substance reacts is proportional to its Active mass Molecular weight None of these Equivalent weight Active mass Molecular weight None of these Equivalent weight 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 Low temperature in a CSTR High temperature in a CSTR High temperature in a PFR Low temperature in a PFR Low temperature in a CSTR High temperature in a CSTR High temperature in a PFR Low temperature in a PFR ANSWER DOWNLOAD EXAMIANS APP
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