1.쉬움
물을 흔히 "만능 용매"라고 부르는 이유는 무엇인가요?
- A모든 물질을 완전히 녹이기 때문이다
- B지구에서 발견되는 유일한 액체이기 때문이다
- C다른 흔한 액체보다 더 많은 물질을 녹이기 때문이다
- D분자 어디에도 부분 전하가 없어 모든 것과 섞이기 때문이다
2.쉬움
What is a single covalent bond?
- AOne electron transferred from one atom to another
- BTwo pairs of electrons shared between two atoms
- COne pair of electrons shared between two atoms
- DThe attraction between two oppositely charged ions
3.쉬움
Which positive ion is found in the highest concentration inside most body cells?
- AMagnesium (Mg²⁺)
- BSodium (Na⁺)
- CCalcium (Ca²⁺)
- DPotassium (K⁺)
4.보통
On an energy diagram, the products are at a lower energy than the reactants. What kind of reaction is shown?
- AEndothermic
- BExothermic
- CNuclear
- DReversible only
5.보통
Oxygen has 8 electrons. What is its electron configuration?
- A1s² 2s² 2p⁴
- B1s² 2s² 2p⁶
- C1s² 2s⁶
- D1s² 2p⁶
6.보통
Why does ice float on liquid water?
- AIce contains trapped air from the freezer
- BIce is less dense than liquid water
- CIce is denser than liquid water
- DIce has a higher mass than the same volume of water
7.어려움
Glucose (C₆H₁₂O₆) and fructose (C₆H₁₂O₆) join by a condensation reaction to form sucrose. What is the formula of sucrose?
- AC₆H₁₂O₆
- BC₁₂H₂₀O₁₀
- CC₁₂H₂₂O₁₁
- DC₁₂H₂₄O₁₂
8.어려움
In terms of bonds, why is a reaction exothermic?
- AMore energy is released forming new bonds than is absorbed breaking old ones
- BForming bonds always absorbs energy
- CMore energy is absorbed breaking old bonds than is released forming new ones
- DNo bonds are broken in exothermic reactions
정답표
- 1. C · 다른 흔한 액체보다 더 많은 물질을 녹이기 때문이다
- 2. C · One pair of electrons shared between two atoms
- 3. D · Potassium (K⁺)
- 4. B · Exothermic
- 5. A · 1s² 2s² 2p⁴
- 6. B · Ice is less dense than liquid water
- 7. C · C₁₂H₂₂O₁₁
- 8. A · More energy is released forming new bonds than is absorbed breaking old ones
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