Free Practice Questions for La Rioja PAU Chemistry
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Sample La Rioja PAU Chemistry Practice Questions
Try these sample questions to review concepts for the La Rioja PAU Chemistry exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Which set of quantum numbers (n, l, m_l, m_s) correctly describes the highest-energy valence electron in a ground-state sodium atom (Na, Z = 11)?
2How does atomic radius change across Period 3 elements from sodium (Na) to chlorine (Cl), and what is the primary cause?
3What is the ground-state electronic configuration of copper (Cu, Z = 29)?
4The first ionization energy of nitrogen (N, Z = 7) is 1402 kJ/mol, whereas that of oxygen (O, Z = 8) is 1314 kJ/mol. Which statement accounts for this anomaly?
5Which of the following orders correctly arranges the isoelectronic species S²⁻, Cl⁻, K⁺, and Ca²⁺ by decreasing ionic radius?
6Calculate the energy of the photon emitted during an electronic transition from n = 3 to n = 1 in a hydrogen atom. (Rydberg constant R_H = 2.18 × 10⁻¹⁸ J)
7Using Slater's rules, what is the effective nuclear charge (Z_eff) experienced by a 3p valence electron in a chlorine atom (Z = 17)?
8What is the de Broglie wavelength of an electron (mass m = 9.11 × 10⁻³¹ kg) traveling at a velocity of 2.00 × 10⁶ m/s? (Planck's constant h = 6.626 × 10⁻³⁴ J·s)
9Which set of quantum numbers represents a valid state for an electron in an atom?
10The first four successive ionization energies (IE_1 to IE_4 in kJ/mol) of a Period 3 element are 738, 1450, 7730, and 10540. To which Group of the periodic table does this element belong?
About the La Rioja PAU Chemistry Exam
The La Rioja PAU Chemistry examination (Química, Universidad de La Rioja 2026) is the official standardized assessment for 2º Bachillerato science and technology students seeking university entrance in La Rioja. Grounded in the official LOMLOE curriculum, the exam evaluates proficiency across 8 key areas: Atomic Structure & Periodic Properties, Chemical Bonding & Intermolecular Forces, Thermodynamics & Thermochemistry, Chemical Kinetics, Chemical Equilibrium & Le Chatelier, Acid-Base Equilibrium & pH Calculations, Redox & Electrochemistry, and Organic Chemistry.
Exam sponsor: Universidad de La Rioja (UR) / Comisión Organizadora de la PAU de La Rioja. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
Written 90-minute standardized exam. Practice items are a multiple-choice analytical adaptation of the official open/semi-constructed La Rioja PAU paper, providing comprehensive syllabus coverage.
Time Limit
90 minutes (1.5 hours)
Passing Score
Marked on a 0–10 scale. Minimum 4.0 required in Access Phase to combine with Bachillerato GPA (60% Bachillerato + 40% PAU >= 5.0 to pass).
Exam / Certification Fees
EUR 55.43 base registration fee for PAU Access Phase (set by Universidad de La Rioja / Gobierno de La Rioja).
Exam sponsor websiteFees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
Atomic Structure & Periodic Properties
Quantum numbers, electron configurations, periodic trends (atomic/ionic radii, ionization energy, electron affinity, electronegativity), and atomic spectra.
Chemical Bonding & Intermolecular Forces
Ionic lattice energy, Lewis structures, VSEPR geometry, orbital hybridization, polarity, metallic bonding, and intermolecular forces.
Thermodynamics & Thermochemistry
Enthalpy of formation/combustion, Hess's Law, bond enthalpies, entropy, Gibbs free energy, and reaction spontaneity.
Chemical Kinetics
Reaction rates, rate laws, reaction orders, Arrhenius equation, activation energy, collision theory, and catalysis.
Chemical Equilibrium & Le Chatelier
Equilibrium constants (Kc, Kp), degree of dissociation, reaction quotient, Le Chatelier's principle, and solubility products (Ksp).
Acid-Base Equilibrium & pH Calculations
Brønsted-Lowry theory, pH/pOH calculations, weak acids/bases, salt hydrolysis, buffer solutions, and volumetric titrations.
Redox & Electrochemistry
Oxidation states, ion-electron balancing, standard reduction potentials, galvanic cells, Nernst equation, and Faraday's laws of electrolysis.
Organic Chemistry: Functional Groups, Isomerism & Reactions
IUPAC nomenclature, functional groups, structural/stereoisomerism, organic reaction mechanisms (addition, substitution, elimination, oxidation, esterification).
Preparing for the La Rioja PAU Chemistry Exam
What You Need to Know
- Passing score: Marked on a 0–10 scale. Minimum 4.0 required in Access Phase to combine with Bachillerato GPA (60% Bachillerato + 40% PAU >= 5.0 to pass).
- Assessment: Written 90-minute standardized exam. Practice items are a multiple-choice analytical adaptation of the official open/semi-constructed La Rioja PAU paper, providing comprehensive syllabus coverage.
- Time limit: 90 minutes (1.5 hours)
- Exam / certification fees: EUR 55.43 base registration fee for PAU Access Phase (set by Universidad de La Rioja / Gobierno de La Rioja). Official sources
Using Our Practice Resources
- Work through all 100 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
Frequently Asked Questions
Is this practice bank in the same format as the real La Rioja PAU exam?
No, and it is important to know the difference. The official La Rioja PAU paper is a 90-minute examination sat in Spanish featuring open-ended quantitative problems, written mechanisms, and conceptual explanations. Under the 2026 PAU design rules agreed by the Comisión Organizadora de la PAU de La Rioja and CRUE, open and semi-constructed responses must account for at least 70% of every paper, so the real exam contains no multiple-choice section. This bank is an English-language multiple-choice study adaptation of the same official 2º Bachillerato syllabus — not an official translation, not a past paper, and not a simulation of the exam format. Use it to drill the underlying knowledge and calculations quickly, then practise solving full open numerical problems in Spanish separately.
What is the format of the La Rioja PAU Chemistry exam?
It is a 90-minute written examination administered at Universidad de La Rioja designated centers, featuring stoichiometry problems, thermochemical calculations, equilibrium problems, acid-base titrations, redox balancing, and organic synthesis.
How is the exam scored for university entrance in Spain?
The exam is graded on a 0–10 scale. In the compulsory Access Phase, a minimum mark of 4.0 is required to combine with Bachillerato GPA (60% Bachillerato + 40% PAU Access Phase >= 5.0). In the Admission Phase, it serves as a high-weighting subject (0.2 factor) for health, chemistry, engineering, and science degrees.
Who should take this exam?
Students in the Science and Technology pathway of 2º Bachillerato in La Rioja who are applying to medicine, pharmacy, chemistry, biotechnology, chemical engineering, or related STEM degree programs.
Which body manages the PAU in La Rioja?
The exam is organized by the Universidad de La Rioja (UR) and the Comisión Organizadora de la PAU de La Rioja.