Biochemistry Quiz

What is the basic unit of a chemical element?

• Compound

• Atom

• Ion

• Molecule

Which type of reaction involves two or more substances combining to form a single compound?

• Decomposition

• Displacement

• Red-Ox

• Composition

In a chemical equation, what do the subscripts (s), (l), (g), and (aq) represent?

• Molecular weight

• Chemical bonds

• Types of reactions

• States of matter

What is the formula for a decomposition reaction?

• A + B → AB

• AB → A + B

• AB + C → AC + B

• A + BC → AC + B

What does oxidation refer to in a redox reaction?

• Breaking down of substances

• Formation of compounds

• Loss of electrons

• Gain of electrons

Which of the following is an example of a displacement reaction?

• C3H8 + O2 → CO2 + H2O

• Na(l) + Cl(g) → NaCl(s)

• H2O2(l) → H2O(l) + O2(g)

• Zn + 2HCl → ZnCl2 + H2

What is the product of the reaction Na(s) + Cl2(g)?

• Na2Cl(g)

• Na2Cl(s)

• NaCl(g)

• NaCl(s)

Which type of reaction involves the transfer of electrons?

• Composition

• Decomposition

• Displacement

• Redox

What is formed when hydrogen peroxide decomposes?

• Water and oxygen

• Ozone and water

• Water and carbon dioxide

• Hydrogen and oxygen

What does the arrow in a chemical equation indicate?

• Reactants

• Products

• Direction of the reaction

• Type of reaction