Elementary Reactions Quiz

The video tutorial explains elementary reactions, where the coefficients of reactants in a chemical equation represent the order of each reactant in the rate law expression. It covers unimolecular, bimolecular, and termolecular reactions, providing examples and explaining how to write rate law expressions based on the coefficients of reactants. The tutorial also discusses the concept of molecularity, which refers to the number of molecules that must collide for a reaction to occur.

What defines an elementary reaction in terms of reactant coefficients?

• The coefficients are always zero.

• The coefficients are equal to the order in the rate law.

• The coefficients are irrelevant to the rate law.

• The coefficients are always greater than the order.

In a unimolecular reaction, how many molecules are required to initiate the reaction?

• One molecule

• Three molecules

• Four molecules

• Two molecules

What is the rate law expression for a reaction where 2A turns into B?

• k[B]^2

• k[B]

• k[A]^2

• k[A]

What is the molecularity of a reaction where two molecules must collide?

• Termolecular

• Unimolecular

• Quadmolecular

• Bimolecular

For the reaction A + B → C, what is the overall order if both coefficients are one?

• One

• Two

• Zero

• Three

In a bimolecular reaction involving A and B, what is the rate law expression?

• k[A]^2[B]

• k[B]^2

• k[A]^2

• k[A][B]

What is the molecularity of a reaction where three molecules are involved?

• Unimolecular

• Bimolecular

• Termolecular

• Quadmolecular

For the reaction A + 2B → C, what is the rate law expression?

• k[A][B]^2

• k[A]^2[B]

• k[A][B]

• k[B]^2

In a reaction involving A, B, and C, what is the overall order if each coefficient is one?

• Three

• Two

• One

• Four

For the reaction 2A + 3B + 4C, what is the rate law expression?

• k[A]^4[B]^3[C]^2

• k[A]^3[B]^2[C]

• k[A][B][C]

• k[A]^2[B]^3[C]^4