1.쉬움
염화 나트륨(식탁용 소금)을 결합시키고 있는 것은 어떤 결합인가요?
- A수소 결합
- B금속 결합
- C이온 결합
- D공유 결합
2.쉬움
What does the prefix "milli-" mean?
- AOne-thousandth (10⁻³)
- BOne-millionth (10⁻⁶)
- COne thousand (10³)
- DOne-hundredth (10⁻²)
3.쉬움
Which of these is a polyatomic ion?
- ASulfate, SO₄²⁻
- BSodium, Na⁺
- COxide, O²⁻
- DChloride, Cl⁻
4.보통
산소 기체 분자 O₂에는 어떤 결합이 있나요?
- A이온 결합
- B무극성 공유 이중 결합
- C극성 공유 단일 결합
- D금속 결합
5.보통
반응 2H₂ + O₂ → 2H₂O에서 산소 3몰로부터 물은 몇 몰이 생기나요?
- A2 mol
- B1.5 mol
- C3 mol
- D6 mol
6.보통
Vinegar contains acetic acid, CH₃COOH. Which functional group makes it an acid?
- AThe hydroxyl group of an alcohol, –OH
- BThe methyl group, –CH₃
- CThe carboxyl group, –COOH
- DThe amino group, –NH₂
7.어려움
A mixture contains sand, salt and water. Which sequence separates all three?
- AUse a magnet to remove the salt, then filter the sand
- BFilter to remove the sand, then distil the filtrate to collect water and leave salt
- CEvaporate all the water first, then filter the salt away from the dry sand
- DDistil first to remove the sand, then filter out the salt
8.어려움
Which coefficients balance the equation for cellular respiration, __C₆H₁₂O₆ + __O₂ → __CO₂ + __H₂O?
- A1, 6, 6, 12
- B1, 3, 6, 6
- C2, 6, 12, 6
- D1, 6, 6, 6
정답표
- 1. C · 이온 결합
- 2. A · One-thousandth (10⁻³)
- 3. A · Sulfate, SO₄²⁻
- 4. B · 무극성 공유 이중 결합
- 5. D · 6 mol
- 6. C · The carboxyl group, –COOH
- 7. B · Filter to remove the sand, then distil the filtrate to collect water and leave salt
- 8. D · 1, 6, 6, 6
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