Chemical Reactions Quiz

What are the five main types of chemical reactions?

• Polymerization Reactions

• Neutralization Reactions

• Combination (Synthesis) Reactions, Decomposition Reactions, Single Replacement (Substitution) Reactions, Double Replacement (Metathesis) Reactions, Combustion Reactions

• Oxidation Reactions

How do you balance a chemical equation?

• Flip the equation upside down

• Count the number of vowels in each compound

• Change the order of the elements in each compound

• Adjust the coefficients in front of each compound to ensure the number of atoms of each element is the same on both sides of the equation.

What is a redox reaction?

• A redox reaction involves the transfer of protons between two species

• A redox reaction involves the release of energy in the form of light

• A redox reaction involves the formation of a new compound

• A redox reaction involves the transfer of electrons between two species.

Give an example of an acid-base reaction.

• HCl + NaOH -> H2O + NaCl

• CH3COOH + NH3 -> NH4CH3COO + H2O

• H2O + NaCl -> HCl + NaOH

• H2SO4 + KOH -> K2SO4 + H2O

Explain what happens in a combustion reaction.

• A combustion reaction involves a substance reacting with oxygen to produce heat, light, and new chemical compounds.

• Combustion reactions produce only light, not heat

• Combustion reactions do not involve oxygen

• Combustion reactions do not result in new chemical compounds

Name the type of reaction when two substances combine to form a single product.

• Synthesis reaction

• Combustion reaction

• Decomposition reaction

• Single replacement reaction

Why is it important to balance chemical equations?

• To confuse students

• To ensure the law of conservation of mass is obeyed.

• To waste time

• To make the equations look pretty

What are the products of the reaction between hydrochloric acid and sodium hydroxide?

• Hydrogen gas and sodium chloride

• Water and sodium chloride

• Sodium hydroxide and water

• Chlorine gas and sodium hydroxide

In a redox reaction, which element is oxidized and which is reduced?

• The element that is oxidized gains electrons, and the element that is reduced loses electrons.

• The element that is oxidized loses electrons, and the element that is reduced gains electrons.

• The element that is oxidized is always a metal, and the element that is reduced is always a nonmetal.

• The element that is oxidized undergoes a decrease in oxidation state, and the element that is reduced undergoes an increase in oxidation state.

What is the general form of a combustion reaction?

• fuel + oxygen -> carbon dioxide + water

• methane + oxygen -> carbon dioxide + hydrogen

• hydrogen + oxygen -> carbon dioxide + water

• fuel + oxygen -> carbon monoxide + water