1.やさしい
元素の原子番号は何を表すか。
- A原子核にある陽子と中性子の合計数
- Bその元素 1 mol 中の原子の数
- C各原子がもつ陽子の数
- D各原子がもつ中性子の数
2.やさしい
In which state are most metals at room temperature?
- ASolid
- BGas
- CPlasma
- DLiquid
3.やさしい
About what percentage of dry air is oxygen?
- A21%
- B1%
- C78%
- D50%
4.ふつう
According to the Brønsted–Lowry definition, what is an acid?
- AAn electron pair donor
- BA proton (H⁺) acceptor
- CA hydroxide ion donor
- DA proton (H⁺) donor
5.ふつう
Water has a high specific heat capacity. How does this help the human body?
- AIt allows oxygen to dissolve in water more easily
- BIt makes the blood more acidic
- CIt helps keep body temperature stable
- DIt makes water a poor solvent for salts
6.ふつう
A patient's arterial blood pH is 7.25. How is this described?
- ANormal
- BAcidosis
- CNeutral
- DAlkalosis
7.むずかしい
A mixture contains sand, salt and water. Which sequence separates all three?
- AUse a magnet to remove the salt, then filter the sand
- BEvaporate all the water first, then filter the salt away from the dry sand
- CDistil first to remove the sand, then filter out the salt
- DFilter to remove the sand, then distil the filtrate to collect water and leave salt
8.むずかしい
A solution has a hydroxide ion concentration of 1 × 10⁻³ mol/L. What is its pH at 25 °C?
- A3
- B11
- C7
- D14
解答
- 1. C · 各原子がもつ陽子の数
- 2. A · Solid
- 3. A · 21%
- 4. D · A proton (H⁺) donor
- 5. C · It helps keep body temperature stable
- 6. B · Acidosis
- 7. D · Filter to remove the sand, then distil the filtrate to collect water and leave salt
- 8. B · 11
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