General Chemistry Final Exam

What is the coefficient of sodium hydroxide (NaOH) in the balanced equation?

• 1

• 3

• 2

• 4

Which of the following is a key characteristic of a reaction that releases heat?

• Heat energy is transferred to the surroundings.

• The temperature of the immediate environment decreases.

• Energy input is necessary to initiate the reaction.

• The change in enthalpy has a positive value.

What term describes a chemical process where a substance loses electrons?

• combustion

• combustion

• reduction

• oxidation

The process of wood burning is a common example of what type of reaction?

• exothermic

• endothermic

• neutralization

• decomposition

The chemical process in which a substance gains electrons is known as:

• precipitation

• oxidation

• reduction

• sublimation

In the reaction Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s), which chemical species undergoes reduction?

• Cu2+

• Zn(s)

• Cu(s)

• Zn2+

In the reaction Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s), which chemical species undergoes oxidation?

• Zn2+

• Cu(s)

• Cu2+

• Zn(s)

Which of the following represents the balanced chemical equation for the reaction between silver nitrate (AgNO₃) and sodium chloride (NaCl)?

• 2AgNO₃ + 2NaCl → 2AgCl + 2NaNO₃

• AgNO₃ + 2NaCl → AgCl₂ + 2NaNO₃

• 2AgNO₃ + NaCl → AgCl₂ + NaNO₃

• AgNO₃ + NaCl → AgCl + NaNO₃

Which of the following is the correctly balanced chemical equation for the combustion of methane (CH₄)?

• CH₄ + O₂ → CO₂ + H₂O

• CH₄ + 2O₂ → CO₂ + 2H₂O

• CH₄ + 3O₂ → CO₂ + 2H₂O

• 2CH₄ + 3O₂ → 2CO₂ + 4H₂O

What are the correct coefficients to balance the equation for the formation of ammonia (NH₃) from nitrogen gas (N₂) and hydrogen gas (H₂)?

• 2N₂ + 3H₂ → 2NH₃

• N₂ + 3H₂ → 2NH₃

• N₂ + H₂ → NH₃ (unbalanced)

• N₂ + 2H₂ → 2NH₃