1.やさしい
What is the name for the attraction of water molecules to each other?
- AAdhesion
- BCohesion
- COsmosis
- DDiffusion
2.やさしい
25 °C の純水のpHはいくつか。
- A7
- B1
- C14
- D0
3.やさしい
What is osmosis?
- AThe dissolving of a gas in a liquid
- BThe movement of solute particles against a gradient using energy
- CThe breaking of a solid into ions
- DThe movement of water across a semipermeable membrane
4.ふつう
A solution has a pH of 2. What is its hydrogen ion concentration?
- A2 mol/L
- B1 × 10⁻¹² mol/L
- C1 × 10⁻² mol/L
- D1 × 10² mol/L
5.ふつう
Which measurement has three significant figures?
- A0.00560
- B5.0006
- C56
- D0.0056
6.ふつう
貴ガスがほとんど反応しないのはなぜか。
- A最外殻がすでに電子で満たされているから
- Bすべて放射性だから
- C電子がまったくないから
- D原子が他の原子よりずっと大きいから
7.むずかしい
An unknown element is shiny, conducts electricity, and reacts vigorously with water to form a basic solution and hydrogen gas. In which group is it most likely?
- AGroup 18 (noble gases)
- BGroup 1 (alkali metals)
- CGroup 17 (halogens)
- DGroup 14 (carbon group)
8.むずかしい
How many atoms in total are in 0.5 mol of water, H₂O?
- A3.01 × 10²³
- B1.81 × 10²⁴
- C9.03 × 10²³
- D6.02 × 10²³
解答
- 1. B · Cohesion
- 2. A · 7
- 3. D · The movement of water across a semipermeable membrane
- 4. C · 1 × 10⁻² mol/L
- 5. A · 0.00560
- 6. A · 最外殻がすでに電子で満たされているから
- 7. B · Group 1 (alkali metals)
- 8. C · 9.03 × 10²³
ステップごとの詳しい解答:このトピックは examproblems.com で練習できます。