Madrid PAU General Sciences Practice Questions - Madrid PAU General Sciences Examination - UCM (Ciencias Generales 2o Bachillerato 2026) Exam - Madrid PAU General Sciences Practice Questions - Madrid PAU General Sciences Examination - UCM (Ciencias Generales 2o Bachillerato 2026) Exam

Question 1

A neutral atom of the chlorine-35 isotope (atomic number Z = 17, mass number A = 35) contains which composition of subatomic particles?

17 protons, 18 neutrons, and 17 electrons 17 protons, 35 neutrons, and 17 electrons 18 protons, 17 neutrons, and 18 electrons 35 protons, 17 neutrons, and 35 electrons

Correct Answer:

17 protons, 18 neutrons, and 17 electrons

Question 2

Which statement correctly describes the general periodic trend of electronegativity across the periodic table?

Electronegativity decreases from left to right across a period and increases down a group. Electronegativity increases from left to right across a period and decreases down a group. Electronegativity remains constant across a period and decreases down a group. Electronegativity increases down a group and remains constant across a period.

Correct Answer:

Electronegativity increases from left to right across a period and decreases down a group.

Question 3

Which characteristic property is typical of metallic substances as explained by the electron sea model?

High brittleness and poor electrical conductivity in the solid state Low boiling points and discrete molecular structures High electrical and thermal conductivity due to delocalized valence electrons Ability to form directional covalent bonds in a rigid lattice

Correct Answer:

High electrical and thermal conductivity due to delocalized valence electrons

Question 4

What are the stoichiometric coefficients required to balance the complete combustion reaction of propane: C3H8 + x O2 -> y CO2 + z H2O?

x = 3, y = 3, z = 4 x = 4, y = 3, z = 4 x = 5, y = 4, z = 3 x = 5, y = 3, z = 4

Correct Answer:

x = 5, y = 3, z = 4

Question 5

Which phase change process describes the direct transition of a substance from the solid state into the gaseous state without passing through a liquid phase?

Sublimation Deposition Vaporization Condensation

Correct Answer:

Sublimation

Question 1

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Prepare with the Madrid PAU General Sciences Practice Questions - Madrid PAU General Sciences Examination - UCM (Ciencias Generales 2o Bachillerato 2026) Exam practice quiz. This question bank includes 100 questions covering mass, solution, energy, constant, and delta. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Madrid PAU General Sciences Practice Questions - Madrid PAU General Sciences Examination - UCM (Ciencias Generales 2o Bachillerato 2026) Exam

This practice set contains 100 questions from the matching question bank and focuses on mass, solution, energy, constant, and delta. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Madrid PAU General Sciences Practice Questions - Madrid PAU General Sciences Examination - UCM (Ciencias Generales 2o Bachillerato 2026) Exam

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