# Chemical Reaction Engineering GATE-1990

**Q 1:** An exothermic gas phase reaction proceeds according to the equation 3A+2B\rightarrow2R . The equilibrium conversion for this reaction

**Q 2:** What is the exit conversion of reactant A for a zero-order reaction taking place in a CSTR with the following data (rate constant = 1 mol/min.L); feed concentration = 1 mol/L; feed flow rate = 0.5 L/min and reactor volume = 1L

**Q 3:** In a homogeneous gas phase reaction A+2B\rightarrow R+S What is the relationship between r_{A} and r_{B},

###### Fill in the Blanks Q 4:

**Q 4:** A 10 m^{3} CSTR is used to decompose a dilute solution of A. The decomposition is irreversible with a first-order rate constant of 3.45 hr^{-1}. If 95 % decomposition of A is desired. The required feed rate is _____________.

**Q 5:** For a uni-molecular gas phase reaction A\rightarrow products , the reaction mechanism is given by

What would be the order of this reaction at very high and very low pressure?

**Q 6:** For an elementary reaction, A+B\rightarrow Products , the reaction rate at 500 K is ten times than at 400 K. Calculate the activation energy for this reaction.

**Q 7:** An irreversible homogeneous liquid phase reaction A\rightarrow B+C is carried out in two isothermal flow reactors of 100 liter capacity each operating at 60 ˚C. Find the exit conversion if both the reactors are operated in series. When (a) both reactors are ideal plug flow reactors (b) an ideal plug flow reactor is followed by an ideal back mix reactor.

Additional data: Feed rate = 20 liters/min; Feed concentration = 1 mol/liter; Rate constant = 0.5 min^{-1}.