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Likely GCE Chemistry Questions and Answers

Published on Sep 11, 2025 • Education

Introduction

Chemistry is a key subject in the General Certificate Examination (GCE). Students often face challenges with concepts like gas laws, bonding, organic reactions, and atomic structure. Practicing solved questions will not only improve accuracy but also help students identify repeated patterns in the exams.

This article presents solved GCE Chemistry past questions with explanations, along with additional generated questions to strengthen preparation.

Worked Questions

Question 1 – Organic Chemistry

The type of reaction alkyne mainly undergoes is:

A. Addition
B. Substitution
C. Esterification
D. Saponification

A. Addition

Alkyne belongs to the hydrocarbon family with a triple bond. It mainly undergoes addition reactions because atoms add across the multiple bond.

Question 2 – Gas Laws

At constant temperature, 200 cm³ of hydrogen at 1.5×1051.5 \times 10^51.5×105 Pa becomes 300 cm³ at 1.0×1051.0 \times 10^51.0×105 Pa. Which law is obeyed?

A. Avogadro’s Law
B. Boyle’s Law
C. Charles’ Law
D. Faraday’s Law

B. Boyle’s Law

Boyle’s Law states that at constant temperature, pressure is inversely proportional to volume.

Question 3 – Bonding

Chlorine atoms form chloride ions by:

A. Donating a lone pair of electrons
B. Gaining an electron
C. Losing an electron
D. Sharing an electron

B. Gaining an electron

Chlorine has 7 valence electrons and needs 1 more to complete its octet, so it gains an electron.

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Question 4 – Atmosphere

The most efficient absorber of ultraviolet radiation in the atmosphere is:

A. CO₂
B. H₂
C. O₃ (Ozone)
D. O₂

C. O₃ (Ozone)

The ozone layer absorbs harmful ultraviolet rays, protecting life on Earth.

Question 5 – Periodic Table

The elements in Group 1 of the periodic table are called:

A. Halogens
B. Noble gases
C. Alkali metals
D. Transition metals

C. Alkali metals

Question 6 – Acids and Bases

Which indicator is most suitable for a strong acid–strong base titration?

A. Litmus
B. Methyl orange
C. Phenolphthalein
D. Universal indicator

C. Phenolphthalein

Question 7 – Electrolysis

During the electrolysis of copper (II) sulphate solution using copper electrodes, the mass of the cathode:

A. Increases
B. Decreases
C. Remains constant
D. Becomes zero

A. Increases

Question 8 – Atomic Structure

The particle that determines the identity of an element is the:

A. Proton
B. Neutron
C. Electron
D. Nucleus

A. Proton

The number of protons (atomic number) defines each element.

Question 9 – Energy

The energy required to remove one electron from an atom in the gaseous state is called:

A. Bond energy
B. Electron affinity
C. Ionization energy
D. Electronegativity

D. Electronegativity

Question 10 – Organic Chemistry

Which of the following hydrocarbons is saturated?

A. Alkane
B. Alkene
C. Alkyne
D. Benzene

Alkanes contain only single bonds and are saturated hydrocarbons.

A. Alkane

Watch the full tutorial here: FULL TUTORIAL

Conclusion

GCE Chemistry exams focus on laws of gases, atomic structure, bonding, and organic reactions. Practicing solved questions builds both speed and confidence.

In summary, students preparing for Chemistry should consistently revise past questions, titration principles, electrolysis, and periodic table trends. With steady practice, success in the GCE exam is certain.

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Keywords

• GCE Chemistry past questions and answers 2025
• Chemistry likely questions for exam practice
• Gas laws and Boyle’s Law GCE
• Organic chemistry multiple choice questions
• Electrolysis and periodic table Chemistry