Home / Flashcard library / College courses / General Chemistry I/II / Practice Questions

College courses

General Chemistry — Practice Questions flashcards

6 of 50 questions free to study here · 24 topics · the whole deck is built into Willys

Multiple-choice practice questions, one best answer each, on stoichiometry, gases, thermochemistry, bonding, kinetics, equilibrium, pH and buffers, solubility and electrochemistry.

Get the app All General Chemistry I/II decks

Practice deck · part of General Chemistry I/II · written against: Standard two-semester sequence. Updated 2026-10-10.

Study the free sample

6 questions from the deck as they are. Flip, rate yourself, filter by topic; your progress stays in this browser.

The 6 sample questions as a list
  1. Written as (n, l, mlm_l⁠, msm_s⁠), which set of quantum numbers could describe an electron in a 4d orbital?

    A) (4, 1, 0, −½)
    B) (4, 2, −1, +½)
    C) (3, 2, +2, +½)
    D) (4, 3, −1, +½)
    B) (4, 2, −1, +½)

    A d subshell has l = 2, and n = 4 puts it in the fourth shell; mlm_l = −1 lies within −2 to +2. l = 3 describes a 4f orbital, and n = 3 with l = 2 is a 3d orbital.
    Atomic Structure & Quantum Numbers
  2. What is the molecular geometry of BrF₅?

    A) Octahedral
    B) Seesaw
    C) Trigonal bipyramidal
    D) Square pyramidal
    D) Square pyramidal

    Bromine has five bonding pairs and one lone pair — six electron domains, an octahedral arrangement. With one position taken by the lone pair, the atoms form a square pyramid; octahedral would need six bonded atoms.
    VSEPR · Hybridization & Polarity
  3. What volume does 8.00 g of O₂ (32.0 g/mol) occupy at 27 °C and 1.00 atm? (R = 0.0821 L·atm/(mol·K))

    A) 6.16 L
    B) 12.3 L
    C) 5.60 L
    D) 0.554 L
    A) 6.16 L

    n = 0.250 mol and T = 300 K, so V = nRT/P = 0.250 × 0.0821 × 300 / 1.00 = 6.16 L. Using 27 instead of 300 K gives 0.554 L; 5.60 L applies the 22.4 L/mol value, which holds only at 0 °C.
    Gas Laws
  4. 1.00 mol of N₂O₄ is placed in an empty 1.00 L flask and N₂O₄(g) ⇌ 2 NO₂(g) is allowed to reach equilibrium. If [NO₂] = 0.40 M at equilibrium, what is KcK_c⁠?

    A) 0.27
    B) 0.50
    C) 0.20
    D) 0.16
    C) 0.20

    Forming 0.40 M NO₂ uses 0.20 M N₂O₄, leaving 0.80 M, so KcK_c = (0.40)² / 0.80 = 0.20. Subtracting the full 0.40 from N₂O₄ gives 0.27, and not squaring [NO₂] gives 0.50.
    Equilibrium Constants & Q
  5. A 1.0 L buffer contains 0.20 mol of acetic acid and 0.20 mol of sodium acetate (pKapK_a = 4.74). What is the pH after 0.050 mol of HCl is added, with no volume change?

    A) 4.74
    B) 1.30
    C) 4.52
    D) 4.96
    C) 4.52

    HCl converts acetate to acetic acid: acid 0.25 mol, base 0.15 mol, so pH = 4.74 + log(0.15/0.25) = 4.52. Adding the 0.050 mol to the base instead gives 4.96 — added acid must lower the pH.
    Buffers & Titrations
  6. In Cr₂O₇²⁻ + 6 Fe²⁺ + 14 H⁺ → 2 Cr³⁺ + 6 Fe³⁺ + 7 H₂O, how does the oxidation number of chromium change, and which species is the oxidizing agent?

    A) +3 to +6; Cr₂O₇²⁻ is the reducing agent
    B) +6 to +3; Fe²⁺ is the oxidizing agent
    C) +6 to +3; Cr₂O₇²⁻ is the oxidizing agent
    D) +7 to +3; Cr₂O₇²⁻ is the oxidizing agent
    C) +6 to +3; Cr₂O₇²⁻ is the oxidizing agent

    In Cr₂O₇²⁻, 2x − 14 = −2 gives Cr = +6, which falls to +3, so dichromate is reduced and is the oxidizing agent. Fe²⁺ is oxidized to Fe³⁺ and is therefore the reducing agent.
    Oxidation Numbers & Redox Balancing

Unlock the whole deck

You are studying a free 6-question sample. All 50 questions of General Chemistry — Practice Questions, the other 2 General Chemistry I/II decks, and spaced-repetition scheduling are built into Willys. 14-day free trial, then $14.99 a year.

Get the app

In Willys, tap Exam Library at the top of your Decks (or Browse Exam Library… under the + button), find the exam on its shelf or by search, tick it and tap Add.

More General Chemistry I/II decks

Atoms, Bonding, Stoichiometry & GasesKinetics, Equilibrium, Acids & Bases, Electrochem

← All General Chemistry I/II decks, with the study guide and topic outline.

About these cards

Review status: Second-reader reviewed, with corrections applied.

Checked against:

  • OpenStax Chemistry 2e, consulted as a reference; no text copied.
  • Checked against Zumdahl, Zumdahl & DeCoste, Chemistry, 10th ed. (Cengage, 2018) (reference only; no text copied).
  • Original questions written for this deck; no standardized-exam, textbook or question-bank items were copied. Numerical values are hypothetical or rounded, and most questions state the constants and molar masses they use.

These are independent study notes written for Willys. They are not official exam material, may contain mistakes, and are no substitute for your course, your teacher or the exam owner's own publications. Found an error? Tell us — corrections ship as a new version of the deck.

Use of these pages is covered by our Terms of Use.