Summary

• Description:

  This PDF document contains Form 3 Chemistry Paper 1 End Term 1 Exam 2025 with Marking Scheme. It has a 2-hour duration and covers the following topics:

  • Chromatography: Identifying substances based on their movement on a chromatogram.
  • Atomic Structure: Drawing dot-and-cross diagrams for molecules and ions.
  • Periodic Table: Defining ionization energy and comparing reactivity of elements based on their ionization energies.
  • Isotopes: Calculating the relative atomic mass of an element based on its isotopes and their abundances.
  • Chemical Formulae: Determining the formula of a compound based on its constituent elements and their valencies.
  • Gas Laws: Applying gas laws to calculate the relative formula mass of a gas and to determine the volume of a gas under different conditions.
  • Stoichiometry: Calculating the number of ions in a solution and determining the empirical formula of a compound based on experimental data.
  • Acids, Bases, and Salts: Identifying and classifying substances based on their pH values.
  • Chemical Reactions: Writing and balancing chemical equations for various reactions, including thermal decomposition and redox reactions.
  • Electrochemistry: Explaining the electrical conductivity of substances based on their structure and bonding.
  • States of Matter: Explaining the properties of different states of matter and their applications.

  The marking scheme and answers are provided in a separate PDF document.

• File Size:

  114.55 KB
• Length:

  8 pages
• Category:

  Exams
• Level:

  Form 3
• Subject:

  CHEMISTRY
• Posted By:

  Caleb_Peter

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