Chemical Reaction Engineering A catalyst is said to be a negative catalyst, ifit Does not initiate the reaction Reduces the value of equilibrium constant All of these Retards the rate of reaction Does not initiate the reaction Reduces the value of equilibrium constant All of these Retards the rate of reaction ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For a zero order reaction, the concentration of product increases with the Total pressure Increase in initial concentration Increase of reaction time Decrease in total pressure Total pressure Increase in initial concentration Increase of reaction time Decrease in total pressure ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering With increase in temperature, the equilibrium conversion of a reversible exothermic reaction Increases Remains unaffected Decreases linearily with temperature Decreases Increases Remains unaffected Decreases linearily with temperature Decreases 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 2τ 0.5τ 0.693τ τ/0.693 2τ 0.5τ 0.693τ τ/0.693 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) ΔHA + ΔHR E E + ΔHA E + ΔHA - ΔHR ΔHA + ΔHR E E + ΔHA E + ΔHA - ΔHR ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering 'Unreacted core model' represents the reaction involving Combustion of coal particles Roasting of sulphide ores Manufacture of carbon disulphide from elements None of these Combustion of coal particles Roasting of sulphide ores Manufacture of carbon disulphide from elements None of these ANSWER DOWNLOAD EXAMIANS APP
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