Chemical Reaction Engineering Half life period of a chemical reaction is Half of the residence time of a reaction Half of the space time of a reaction None of these The time required to reduce the concentration of the reacting substance to half its initial value Half of the residence time of a reaction Half of the space time of a reaction None of these The time required to reduce the concentration of the reacting substance to half its initial value ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times. 12 8 32 16 12 8 32 16 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering In autocatalytic reactions, One of the reactants acts as a catalyst Catalysts have very high selectivity One of the products acts as a catalyst No catalyst is used One of the reactants acts as a catalyst Catalysts have very high selectivity One of the products acts as a catalyst No catalyst is used ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of __________ order. Second First Zero None of these Second First Zero None of these ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering With increase in temperature, the rate constant obeying Arhenious equation Decreases exponentially Decreases Can either increase or decrease ; depends on the frequency factor Increases Decreases exponentially Decreases Can either increase or decrease ; depends on the frequency factor Increases ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the Temperature Both A & B Pressure Neither A nor B Temperature Both A & B Pressure Neither A nor B ANSWER DOWNLOAD EXAMIANS APP