FREE RPAL Reactants Questions and Answers

Question 1

What is a reactant in a chemical reaction?

Accepted Answer

A substance that undergoes change during a reaction

Answer

A substance that speeds up the reaction without being consumed

Answer

A substance that is formed as a result of the reaction

Answer

A byproduct of the reaction

Question 2

Which of the following correctly describes the role of reactants in a chemical equation?

Accepted Answer

Reactants are the substances that react to form new products

Answer

Reactants are always present in larger quantities than products

Answer

Reactants are placed on the right side of the equation

Answer

Reactants determine the color of the products

Question 3

In the chemical equation 2H₂ + O₂ → 2H₂O, which are the reactants?

Accepted Answer

H₂ and O₂

Answer

H₂O

Answer

H₂

Answer

O₂ and H₂O

Question 4

If you start a reaction with 5 moles of reactant A and 3 moles of reactant B, but only 2 moles of reactant A are required, what happens to the excess reactant A?

Accepted Answer

It remains unreacted as a leftover

Answer

It is completely used up

Answer

It becomes a product

Answer

It speeds up the reaction

Question 5

How can you identify the limiting reactant in a chemical reaction?

Accepted Answer

It is the reactant that produces the least amount of product

Answer

It is the reactant present in the smallest quantity

Answer

It is the reactant that is left over after the reaction

Answer

It is the reactant that causes the reaction to stop