1.やさしい
What is a solution?
- AA mixture that is the same throughout (homogeneous)
- BA pure compound made of two elements
- CA solid that has been melted
- DA mixture in which particles settle out on standing
2.やさしい
粒子が決まった形と決まった体積をもつ物質の状態はどれか。
- Aプラズマ
- B液体
- C気体
- D固体
3.やさしい
化学における物質量 1 mol とは何か。
- A6.02 × 10²³ 個の粒子を含む物質の量
- Bその尺度での、炭素12原子ちょうど 1 個のグラム単位の質量
- Cどの気体でも 1 リットルの体積
- D原子中の陽子の数
4.ふつう
Nitric acid (HNO₃) reacts with potassium hydroxide (KOH). Which salt forms?
- APotassium nitrate, KNO₃
- BPotassium nitrite, KNO₂
- CNitrogen hydroxide, NOH
- DPotassium hydride, KH
5.ふつう
What is the normal boiling point of a liquid?
- AThe temperature at which its particles stop moving
- BThe temperature at which its vapour pressure equals 1 atmosphere
- CThe temperature at which it first starts to evaporate
- DThe temperature at which its density is greatest
6.ふつう
A red blood cell is placed in pure water (a hypotonic solution). What happens?
- ASalt enters the cell, which shrinks
- BWater enters the cell, which swells and may burst
- CWater leaves the cell, which shrinks and wrinkles
- DNothing happens to the cell
7.むずかしい
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
- COlive oil has no C=C double bonds, so its chains stay straight and pack tightly
- DButter contains more water, which freezes at room temperature
8.むずかしい
同じ元素の 2 つの同位体が異なる性質はどれか。
- A中性原子の電子の数
- B関与する化学反応
- C原子番号
- D質量数
解答
- 1. A · A mixture that is the same throughout (homogeneous)
- 2. D · 固体
- 3. A · 6.02 × 10²³ 個の粒子を含む物質の量
- 4. A · Potassium nitrate, KNO₃
- 5. B · The temperature at which its vapour pressure equals 1 atmosphere
- 6. B · Water enters the cell, which swells and may burst
- 7. B · Olive oil has more C=C double bonds, which kink the chains so they cannot pack closely
- 8. D · 質量数
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