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59+ Free Basque PAU Chemistry Practice Questions

Basque Country PAU Chemistry Examination — UPV/EHU (2º Bachillerato 2026) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: Basque PAU Chemistry Exam

90 Minutes

Exam time duration

UPV/EHU PAU Commission

EUR 86.33

Ordinary registration fee

UPV/EHU 2026 Fees

0–10 Scale

Grading scale for Bachillerato and PAU exams

Spanish Ministry of Education

1 Core Blocks

Official syllabus domains

UPV/EHU Syllabus

100 Questions

Practice bank size in OpenExamPrep

OpenExamPrep

Basque Country PAU Chemistry (UPV/EHU 2026) is a 90-minute university entrance exam assessing 2º Bachillerato syllabus domains.

Sample Basque PAU Chemistry Practice Questions

Try these sample questions to test your Basque PAU Chemistry exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 59+ question experience with AI tutoring.

1If the enthalpy of reaction is -10 kJ/mol, what type of reaction is it?
A.Exothermic
B.Endothermic
C.Isothermic
D.Isobaric
Explanation: A negative enthalpy change (-10 kJ/mol) indicates that heat is released by the system, which defines an exothermic reaction.
2For the reaction A <-> B with Kc = 2, if [A] = 1M, what is [B] at equilibrium?
A.2 M
B.0.50 M
C.4 M
D.0 M
Explanation: Kc = [B]/[A]. Since [A] = 1M and Kc = 2, [B] must be 2M.
3What is the pH of a solution with [H+] = 10^-4 M?
A.4
B.10
C.-4
D.5
Explanation: pH is defined as -log[H+]. Therefore, -log(10^-4) = 4.
4In the reaction Zn + Cu2+ -> Zn2+ + Cu, what is the oxidation state of Zn after the reaction?
A.+2
B.0
C.+1
D.-2
Explanation: Zn goes from an oxidation state of 0 (elemental) to +2 in Zn2+. It is oxidized by losing 2 electrons.
5What is the functional group of CH3-CH2-OH?
A.Alcohol
B.Aldehyde
C.Ketone
D.Carboxylic acid
Explanation: The -OH group bonded to a saturated carbon atom characterizes an alcohol.
6How many moles of H2 are produced when 6 moles of Zn react with excess HCl?
A.6 moles
B.12 moles
C.3.0 moles
D.7 moles
Explanation: The balanced equation is Zn + 2HCl -> ZnCl2 + H2. For every mole of Zn, one mole of H2 is produced. Thus 6 moles of Zn produce 6 moles of H2.
7If the enthalpy of reaction is -70 kJ/mol, what type of reaction is it?
A.Exothermic
B.Endothermic
C.Isothermic
D.Isobaric
Explanation: A negative enthalpy change (-70 kJ/mol) indicates that heat is released by the system, which defines an exothermic reaction.
8For the reaction A <-> B with Kc = 8, if [A] = 1M, what is [B] at equilibrium?
A.8 M
B.0.12 M
C.16 M
D.0 M
Explanation: Kc = [B]/[A]. Since [A] = 1M and Kc = 8, [B] must be 8M.
9What is the pH of a solution with [H+] = 10^-10 M?
A.10
B.4
C.-10
D.11
Explanation: pH is defined as -log[H+]. Therefore, -log(10^-10) = 10.
10How many moles of H2 are produced when 12 moles of Zn react with excess HCl?
A.12 moles
B.24 moles
C.6.0 moles
D.13 moles
Explanation: The balanced equation is Zn + 2HCl -> ZnCl2 + H2. For every mole of Zn, one mole of H2 is produced. Thus 12 moles of Zn produce 12 moles of H2.

About the Basque PAU Chemistry Practice Questions

Verified exam format metadata for Basque Country PAU Chemistry Examination — UPV/EHU (2º Bachillerato 2026) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.