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100+ Free LC Physics and Chemistry Practice Questions

Leaving Certificate Physics and Chemistry (Ireland) practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: LC Physics and Chemistry Exam

3 hours

Duration of the Leaving Certificate Physics and Chemistry written paper

State Examinations Commission / subject course outlines

6 questions

Candidates answer six equal-mark questions, typically three Physics and three Chemistry

CareersPortal and SEC paper structure

Higher and Ordinary

Physics and Chemistry is offered at two levels, Higher (H1-H8) and Ordinary (O1-O8)

State Examinations Commission grading scale

Discrete subject

May not be taken with Physics alone or Chemistry alone

Curriculum Online - Physics and Chemistry syllabus

8-point grades

Results use the eight-point scale where each grade is a percentage band

State Examinations Commission grading scale

EUR 116

2026 Leaving Certificate exam fee for a school-based candidate (covers all subjects)

Citizens Information - Examination fees

Section I and II

The paper has a Physics section and a Chemistry section

State Examinations Commission past papers

100

Free original multiple-choice practice questions in this bank

OpenExamPrep

Leaving Certificate Physics and Chemistry is an Irish senior-cycle combined science subject set by the State Examinations Commission (SEC) and sat at Higher Level (H1-H8) or Ordinary Level (O1-O8). It is examined by one 3-hour written paper with Section I Physics and Section II Chemistry; candidates answer six equal-mark questions, normally three from each section, supported by mandatory practical experiments. Candidates may not also take Physics alone or Chemistry alone. There is no single pass mark; grades are percentage bands. This free bank gives 100 original single-best-answer questions mixing both disciplines across mechanics, light, electricity, atomic structure, bonding, stoichiometry, acids-bases, redox and organic chemistry.

Sample LC Physics and Chemistry Practice Questions

Try these sample questions to test your LC Physics and Chemistry exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A car travels 120 m in 8.0 s at constant velocity. What is its velocity?
A.8.0 m s⁻¹
B.15 m s⁻¹
C.960 m s⁻¹
D.0.067 m s⁻¹
Explanation: Velocity for constant speed in a straight line is displacement divided by time: v = s/t = 120/8.0 = 15 m s⁻¹.
2A body starts from rest and accelerates uniformly at 2.0 m s⁻² for 5.0 s. How far does it travel?
A.5.0 m
B.10 m
C.25 m
D.50 m
Explanation: From rest, s = ut + ½at² = 0 + ½(2.0)(5.0)² = ½ × 2 × 25 = 25 m.
3Which statement is Newton’s first law of motion?
A.Force equals mass times acceleration
B.For every action there is an equal and opposite reaction
C.A body remains at rest or in uniform motion unless acted on by a resultant force
D.Momentum is always conserved
Explanation: Newton’s first law states that a body continues at rest or in uniform straight-line motion unless a resultant force acts on it. It is the law of inertia.
4A force of 12 N acts on a mass of 3.0 kg. What is the acceleration produced (ignore friction)?
A.0.25 m s⁻²
B.4.0 m s⁻²
C.15 m s⁻²
D.36 m s⁻²
Explanation: From Newton’s second law, a = F/m = 12/3.0 = 4.0 m s⁻².
5The weight of a 2.0 kg mass on Earth (g = 9.8 m s⁻²) is approximately:
A.2.0 N
B.4.9 N
C.9.8 N
D.19.6 N
Explanation: Weight is a force: W = mg = 2.0 × 9.8 = 19.6 N. Mass is 2.0 kg; weight is not the same as mass.
6Two ice skaters push apart. One of mass 60 kg moves left at 2.0 m s⁻¹. The other has mass 40 kg. Ignoring friction, what is her velocity to the right?
A.1.2 m s⁻¹
B.2.0 m s⁻¹
C.3.0 m s⁻¹
D.5.0 m s⁻¹
Explanation: Momentum is conserved and initial momentum is zero: 60×2.0 = 40×v ⇒ v = 120/40 = 3.0 m s⁻¹ to the right.
7The gravitational field strength g near Earth’s surface is related to the universal constant G by g = GM/R². If Earth’s mass and radius were both doubled, g would:
A.Halve
B.Stay the same
C.Double
D.Quadruple
Explanation: g' = G(2M)/(2R)² = 2GM/(4R²) = (1/2)(GM/R²) = g/2. Doubling mass doubles g; doubling radius quarters g via R²; net effect is half.
8Work done by a constant force is defined as:
A.Force divided by distance
B.Force times distance in the direction of the force
C.Mass times velocity
D.Energy divided by time
Explanation: Work W = Fs when force and displacement are parallel; more generally W = Fs cos θ. The SI unit is the joule (N m).
9A 4.0 kg object falls freely from rest through 5.0 m. Taking g = 10 m s⁻², its kinetic energy just before impact is:
A.20 J
B.50 J
C.100 J
D.200 J
Explanation: Loss in PE equals gain in KE: mgh = 4.0 × 10 × 5.0 = 200 J. (Or v² = 2gh = 100, KE = ½mv² = 200 J.)
10Absolute zero on the Celsius scale is approximately:
A.0 °C
B.−100 °C
C.−273 °C
D.273 °C
Explanation: Absolute zero is 0 K, which is approximately −273 °C. It is the extrapolated intercept of the volume–temperature graph for an ideal gas.

About the LC Physics and Chemistry Practice Questions

Verified exam format metadata for Leaving Certificate Physics and Chemistry (Ireland) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.