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CIE · IGCSE · Co-ordinated Science (Double Award)

States of Matter and Atomic Structure
Practice Questions

20 CIE IGCSE Co-ordinated Science (Double Award) questions on States of Matter and Atomic Structure, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on States of Matter and Atomic Structure

Question 1 · 1 mark · Difficulty 1/3

Which property is characteristic of a substance with a giant ionic lattice structure?

  1. It conducts electricity when solid and when dissolved in water
  2. It is insoluble in water because of strong ionic bonds
  3. It conducts electricity when molten or dissolved in water
  4. It has a low melting point due to weak electrostatic forces
Show answer & explanation
✓ Answer: C — It conducts electricity when molten or dissolved in water
Ionic compounds conduct electricity when molten or dissolved in water because the ions are free to move and carry charge. In the solid state, ions are held in fixed positions in the lattice and cannot move, so they do not conduct. Ionic compounds generally have high melting points due to strong electrostatic attractions, and many are soluble in water.
Question 2 · 1 mark · Difficulty 2/3

A student tests four unknown substances for electrical conductivity in solid state and when dissolved in water. Substance X conducts when dissolved in water but not when solid. What type of structure and bonding does substance X most likely have?

  1. Giant covalent lattice with strong covalent bonds throughout
  2. Simple molecular structure with weak intermolecular forces
  3. Metallic structure with delocalised electrons throughout
  4. Giant ionic lattice with ions held in fixed positions when solid
Show answer & explanation
✓ Answer: D — Giant ionic lattice with ions held in fixed positions when solid
An ionic compound does not conduct electricity in the solid state because the ions are held in fixed positions in the lattice. When dissolved in water, the lattice breaks down and the ions are free to move, allowing electrical conduction. Metals (A) conduct in both states. Simple molecular substances (B) do not conduct in either state as they have no free ions or electrons. Giant covalent substances (D) do not conduct in either state.
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20 questions · 25 min · free

CIE IGCSE Co-ordinated Science (Double Award): States of Matter and Atomic Structure FAQ

Is Kramizo free for CIE IGCSE students preparing for Co-ordinated Science (Double Award)?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix States of Matter and Atomic Structure practice with other Co-ordinated Science (Double Award) topics or even switch to a totally different CIE subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the States of Matter and Atomic Structure questions aligned to the official CIE IGCSE Co-ordinated Science (Double Award) syllabus?
Every question is written against the published CIE IGCSE Co-ordinated Science (Double Award) specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CIE paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CIE.
How is States of Matter and Atomic Structure typically tested on CIE IGCSE Co-ordinated Science (Double Award) papers?
States of Matter and Atomic Structure appears across multiple question types on real CIE IGCSE Co-ordinated Science (Double Award) papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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