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 Batch process is preferred over continuous process, when the Same equipment can not be used for several processes of the same nature Sales demand of product is not steady All of these Product yields and quality can not be achieved in continuous process, because of long residence time Same equipment can not be used for several processes of the same nature Sales demand of product is not steady All of these Product yields and quality can not be achieved in continuous process, because of long residence time ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Which of the following is not endothermic in nature? Steam reforming of naphtha Combustion of sulphur Thermal cracking of fuel oil Gasification of carbon Steam reforming of naphtha Combustion of sulphur Thermal cracking of fuel oil Gasification of carbon ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A catalyst loses its activity due to Loss in surface area of the active component Agglomeration of metal particles caused by thermal sintering of the solid surface Covering of the catalytic active sites by a foregin substance All of these Loss in surface area of the active component Agglomeration of metal particles caused by thermal sintering of the solid surface Covering of the catalytic active sites by a foregin substance All of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering With increase in the space time of an irreversible isothermal reaction being carried out in a P.F. reactor, the conversion will Increase Decrease Remain same Data in insufficient; can't be predicted Increase Decrease Remain same Data in insufficient; can't be predicted ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the Value of threshold energy decreases Increased temperature reduces the activation energy Collision frequency increases Fraction of molecules having threshold energy increases Value of threshold energy decreases Increased temperature reduces the activation energy Collision frequency increases Fraction of molecules having threshold energy increases ANSWER DOWNLOAD EXAMIANS APP
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