1.쉬움
Which technique is used to separate the different coloured dyes in an ink?
- ADistillation of the ink
- BMagnetism
- CFiltration
- DChromatography
2.쉬움
According to collision theory, what must happen for particles to react?
- AThey must both be in the solid state at the same time
- BThey must stay completely still next to each other
- CThey must have the same mass
- DThey must collide with enough energy and the right orientation
3.쉬움
Which of these is a polyatomic ion?
- ASulfate, SO₄²⁻
- BChloride, Cl⁻
- CSodium, Na⁺
- DOxide, O²⁻
4.보통
Why does the vapour pressure of a liquid increase as it is heated?
- AThe molecules become heavier and press harder on the surface
- BMore molecules have enough energy to escape into the gas phase
- CThe liquid's volume decreases and squeezes out vapour
- DThe attractions between the molecules become stronger
5.보통
얼음물에서 얼음이 녹는 동안 온도는 어떻게 되나요?
- A0 °C 아래로 떨어진다
- B그 시간 내내 꾸준히 오른다
- C곧바로 100 °C까지 오른다
- D얼음이 모두 녹을 때까지 0 °C로 유지된다
6.보통
What is the shape of a water molecule?
- ABent
- BTetrahedral
- CFlat triangle
- DLinear
7.어려움
Steel can be protected from rusting by coating it with zinc (galvanising). Why does the steel stay protected even if the zinc coating is scratched?
- AZinc is less reactive than iron, so it pushes oxygen and water away from the iron
- BZinc absorbs all the water from the air
- CZinc is more reactive than iron, so it corrodes instead of the iron
- DZinc turns the iron into a noble metal
8.어려움
J.J. Thomson's cathode ray experiments led to which discovery?
- AAtoms have a dense, positively charged nucleus
- BElectrons occupy fixed energy levels
- CThe nucleus contains uncharged neutrons
- DAtoms contain small, negatively charged particles
정답표
- 1. D · Chromatography
- 2. D · They must collide with enough energy and the right orientation
- 3. A · Sulfate, SO₄²⁻
- 4. B · More molecules have enough energy to escape into the gas phase
- 5. D · 얼음이 모두 녹을 때까지 0 °C로 유지된다
- 6. A · Bent
- 7. C · Zinc is more reactive than iron, so it corrodes instead of the iron
- 8. D · Atoms contain small, negatively charged particles
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