Q$1)$ What is a key assumption made in deriving the design equations for both batch reactors and continuous stirred$-$tank reactors $($CSTR$)?$

A$)$ The reaction follows first$-$order kinetics.

B$)$ The system operates at steady state.

C$]$ The mixture is well mixed, resulting in uniform composition throughout.

D$)$ The reaction rate is always proportional to the concentration of the reactant.

Q$2)$ Identify the correct reaction type for the reaction of a reactant breaking down into two or more products:

A$)$ Isomerization

B$)$ Formation

Q$3)$ Identify the correct reaction type for the reaction of two or more reactants combining to form a single product:

A$)$ Isomerization

B$)$ Formation

C$)$ Decomposition

Q$4)$ Identify the correct reaction type for the reaction of a reactant converted to a different chemical structure with the same molecular formula:

A$)$ Isomerization

B$)$ Formation

C$)$ Decomposition

Q$5)-r_A$ is a universal notation for reaction rate. What does the negative sign indicate?

a$)$ Rate of formation of $A$

b$)$ Rate of disappearance of $A$

c$)$ Rate of dissociation of $A$

d$)$ Rate of association of $A$