the answers with an X are wrong, for study purpose, can someone please get correct answer.

7. Which of the following statement(s) is/are true about zero order reactions? a. A plot of concentration vs, time will yield an exponential curve b. Increasing the reacting species concentration increases the speed of the reaction c. The speed of the reaction is independent of the concentration of the reactants d. All of the above a and b are correct 8. Properties of a PFR include: a. Every drop of fluid along the direction flow remains unique and it does not mix with the fluid ahead or behind it Mixing may or may not occur in the radial direction c. Concentration is homogenous everywhere d. All of the above e. a and b are correct 9. Properties of energy transfer through conduction (molecular diffusion) includes: Q3. Transfer of heat through a material is due to a temperature gradient. b. Transfer results from the random molecular motion of molecules in a fluid c. Energy is transmitted in the form of waves d. All of the above e. a and b are correct 7. Which of the following statement(s) is/are true about zero order reactions? a. A plot of concentration vs, time will yield an exponential curve b. Increasing the reacting species concentration increases the speed of the reaction c. The speed of the reaction is independent of the concentration of the reactants d. All of the above a and b are correct 8. Properties of a PFR include: a. Every drop of fluid along the direction flow remains unique and it does not mix with the fluid ahead or behind it Mixing may or may not occur in the radial direction c. Concentration is homogenous everywhere d. All of the above e. a and b are correct 9. Properties of energy transfer through conduction (molecular diffusion) includes: Q3. Transfer of heat through a material is due to a temperature gradient. b. Transfer results from the random molecular motion of molecules in a fluid c. Energy is transmitted in the form of waves d. All of the above e. a and b are correct