1.쉬움
Which two substances must be present for iron to rust?
- ACarbon dioxide and salt
- BNitrogen and water
- COxygen and water
- DHydrogen and oxygen gas only
2.쉬움
염소, 브로민, 아이오딘은 어느 족의 예인가요?
- A전이 금속
- B비활성 기체
- C알칼리 금속
- D할로젠
3.쉬움
How many electrons are shared in a double covalent bond?
- A4
- B2
- C6
- D8
4.보통
__N₂ + __H₂ → __NH₃를 맞추는 계수는 무엇인가요?
- A1, 3, 2
- B1, 1, 1
- C2, 3, 2
- D1, 3, 1
5.보통
A reaction is at equilibrium. More of one reactant is added. According to Le Chatelier's principle, what happens?
- AThe equilibrium shifts toward the products
- BThe reaction stops completely
- CNothing changes
- DThe equilibrium shifts toward the reactants
6.보통
강산을 설명하는 것은 어느 것인가요?
- ApH가 7보다 높다
- B물에서 완전히 이온화한다
- C수소 이온을 일부만 내놓는다
- D항상 농도가 매우 높다
7.어려움
Olive oil is liquid at room temperature, while butter is solid. Which explanation is correct?
- AOlive oil molecules are ionic, while butter molecules are covalent
- BOlive oil has more C=C double bonds, which kink the chains so they cannot pack closely
- CButter contains more water, which freezes at room temperature
- DOlive oil has no C=C double bonds, so its chains stay straight and pack tightly
8.어려움
A patient's temperature is 104 °F. What is it in degrees Celsius?
- A40 °C
- B43 °C
- C58 °C
- D72 °C
정답표
- 1. C · Oxygen and water
- 2. D · 할로젠
- 3. A · 4
- 4. A · 1, 3, 2
- 5. A · The equilibrium shifts toward the products
- 6. B · 물에서 완전히 이온화한다
- 7. B · Olive oil has more C=C double bonds, which kink the chains so they cannot pack closely
- 8. A · 40 °C
자세한 단계별 풀이: examproblems.com에서 이 주제를 연습하세요.