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Chemistry for Dummies - Statistics
General Stats
- This quiz has been taken 828 times
- The average score is 12 of 15
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| Which element's symbol is O? | oxygen | 99%
|
| What are balloons that float upwards usually filled with? | helium | 97%
|
| What is the chemical formula for water? | H₂O | 96%
|
| Which of these substances doesn't dissolve in water? | oil | 96%
|
| Which of these substances is flammable? | wood | 96%
|
| What is evaporation? | transition of a substance from a liquid to a gaseous state | 95%
|
| At what temperature does water freeze? | 0 °C / 32 °F | 94%
|
| What is measured by the pH scale? | environment's acidity or alkalinity | 93%
|
| How does rust form? | due to a long-term contact of metal with fresh air | 89%
|
| Is an electron positively or negatively charged? | negatively | 86%
|
| Sodium chloride is the scientific term for what substance? | salt | 84%
|
| Which gas is the main component of air? | nitrogen | 77%
|
| Which of these substances is a liquid at r.t.? | ethyl alcohol | 69%
|
| What do the numbers 90, 91 etc. mean at gas stations near the petrol pumps? | it's an octane rating that determines resistance to uncontrolled spontaneous combustion | 40%
|
| What causes the protein to coagulate? | high temperature | 21%
|
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