1.쉬움
What is an element?
- AA particle with an electric charge
- BA physical mixture of different substances
- CA substance of two or more elements chemically bonded together
- DA substance made of only one kind of atom
정답이 있는 간호학 입학 시험 대비 화학 학습지
2.쉬움
What does organic chemistry study?
- ACompounds based on carbon
- BOnly compounds found in plants
- CCompounds made of metals
- DOnly the noble gases
3.쉬움
What is a cation?
- AA molecule with no charge
- BA neutral atom
- CA negatively charged ion
- DA positively charged ion
4.보통
How does a mixture of iron filings and sulfur powder differ from the compound iron sulfide?
- AThe mixture is formed by a chemical reaction between the two elements
- BThe compound keeps the magnetic properties of iron
- CThe mixture has a fixed ratio of iron to sulfur
- DThe mixture can be separated physically, for example with a magnet
5.보통
칼슘(Ca²⁺)과 염소(Cl⁻)로 만들어지는 화합물은 무엇인가요?
- ACa₂Cl
- BCaCl
- CCaCl₂
- DCa₂Cl₃
6.보통
Which type of bond holds the two atoms together in a nitrogen molecule, N₂?
- AA double covalent bond
- BAn ionic bond
- CA single covalent bond
- DA triple covalent bond
7.어려움
용액의 pH가 6에서 4로 변했습니다. 수소 이온 농도는 어떻게 되었나요?
- A2배 작아졌다
- B2배 커졌다
- C100배 커졌다
- D100배 작아졌다
8.어려움
Which of these is a redox reaction?
- AAgNO₃ + NaCl → AgCl + NaNO₃
- BCaCO₃ → CaO + CO₂
- CNaOH + HCl → NaCl + H₂O
- DZn + CuSO₄ → ZnSO₄ + Cu
정답표
- 1. D · A substance made of only one kind of atom
- 2. A · Compounds based on carbon
- 3. D · A positively charged ion
- 4. D · The mixture can be separated physically, for example with a magnet
- 5. C · CaCl₂
- 6. D · A triple covalent bond
- 7. C · 100배 커졌다
- 8. D · Zn + CuSO₄ → ZnSO₄ + Cu
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