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P4 General Studies: States of Matter and Dissolving (Paper 1 (basics))
Tutor Prep Guide · the three states of matter, dissolving with solutes and solvents, factors that change dissolving speed, saturated solutions and separation by filtering or evaporation
P4 General Studies: States of Matter and Dissolving (Paper 1 (basics))
Paper one starts from the basic features of the three states, then works on solution mass and percentages.
Direct answers Ask first which state it is and whether a solute was added; the answer follows.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: P4 General Studies: States of Matter and Dissolving |
| Level | parts of a closed circuit, conductors against insulators, series against parallel, adding up battery voltage, and electrical safety |
02 Questions (10 items)
- FoundationWhich state of matter is ice?
- FoundationWhat happens to water when it is heated to 100 degrees Celsius?
- FoundationFive grams of sugar go into each of three cups. How much sugar is used?
- IntermediateThirty grams of salt dissolve completely in 200 mL of water. What is the mass of the solution?
- IntermediateThree of five materials tested dissolve in water. What proportion is that, in percentage points?
- IntermediateA cup of water loses 40 mL over three days by evaporation. What is the daily average?
- ChallengeWhich state has no fixed shape but a fixed volume?
- ChallengeAfter sugar dissolves in water, is the sugar still in the cup?
- ChallengeNine of twelve liquids are solutions. What proportion is that, in percentage points?
- Error redoError clinic: sugar disappears once it dissolves in water. Is that right?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | Solid. | Ice keeps a fixed shape and volume, so it is the solid state of water. |
| 2 | It boils and turns into steam. | At normal pressure water boils at 100 degrees, changing from liquid to gas. |
| 3 | 15 g. | Three times five is 15, so 15 g of sugar is used. |
| 4 | 230 g. | Solution mass is solvent plus solute: 200 plus 30 gives 230 g. |
| 5 | 60.0 percentage points. | Three divided by five, multiplied by 100, gives 60.0 percentage points. |
| 6 | 13.3 mL. | Forty divided by three gives 13.3 mL a day. |
| 7 | Liquid. | A liquid takes the shape of its container yet keeps its volume; a gas keeps neither. |
| 8 | Yes. | The sugar breaks into tiny particles spread through the water; it has not vanished. |
| 9 | 75.0 percentage points. | Nine divided by twelve, multiplied by 100, gives 75.0 percentage points. |
| 10 | No. | The sugar only spreads out as tiny particles; its mass stays, and evaporating the water recovers it. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
After paper one, take paper two and sort out series against parallel in one pass.Tutor Registration →
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