1.쉬움
Which method separates two liquids with different boiling points, such as alcohol and water?
- ASieving
- BFiltration
- CUsing a magnet
- DDistillation
2.쉬움
다음 중 화학 변화인 것은 어느 것인가요?
- A나무가 타는 것
- B얼음이 녹는 것
- C설탕이 차에 녹는 것
- D유리가 깨지는 것
3.쉬움
Which property is typical of bases?
- AThey turn blue litmus red
- BThey feel slippery
- CThey taste sour
- DThey have a pH below 7
4.보통
Normal saline (0.9% NaCl) is used for IV fluids. How is it described compared with blood?
- AIsotonic
- BHypotonic
- CHypertonic
- DSaturated
5.보통
수소 결합이란 무엇인가요?
- A한 분자의 수소와 다른 분자의 O, N 또는 F 원자 사이의 인력
- B수소의 원자핵 안에 있는 결합
- C수소 이온과 금속 사이의 이온 결합
- DH₂에서 두 수소 원자 사이의 공유 결합
6.보통
Which element has chemical properties most similar to calcium?
- AMagnesium
- BPotassium
- CCarbon
- DScandium
7.어려움
Olive oil is liquid at room temperature, while butter is solid. Which explanation is correct?
- AOlive oil has no C=C double bonds, so its chains stay straight and pack tightly
- BOlive oil has more C=C double bonds, which kink the chains so they cannot pack closely
- COlive oil molecules are ionic, while butter molecules are covalent
- DButter contains more water, which freezes at room temperature
8.어려움
In the reaction NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq), which ions are spectator ions?
- ANa⁺ and Cl⁻
- BNa⁺ and NO₃⁻
- CAg⁺ and NO₃⁻
- DAg⁺ and Cl⁻
정답표
- 1. D · Distillation
- 2. A · 나무가 타는 것
- 3. B · They feel slippery
- 4. A · Isotonic
- 5. A · 한 분자의 수소와 다른 분자의 O, N 또는 F 원자 사이의 인력
- 6. A · Magnesium
- 7. B · Olive oil has more C=C double bonds, which kink the chains so they cannot pack closely
- 8. B · Na⁺ and NO₃⁻
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