1.やさしい
元素の原子番号は何を表すか。
- A各原子がもつ中性子の数
- Bその元素 1 mol 中の原子の数
- C原子核にある陽子と中性子の合計数
- D各原子がもつ陽子の数
2.やさしい
Standard atmospheric pressure (1 atm) is equal to how many millimetres of mercury?
- A1000 mmHg
- B760 mmHg
- C120 mmHg
- D100 mmHg
3.やさしい
ヘリウムやネオンなどの貴ガス(希ガス)が含まれる族はどれか。
- A17 族
- B1 族
- C2 族
- D18 族
4.ふつう
How does dissolving salt in water affect the water's boiling point?
- AIt lowers the boiling point slightly
- BIt has no effect on the boiling point
- CIt raises the boiling point slightly
- DIt makes the water boil at room temperature
5.ふつう
Water can act as an acid in some reactions and as a base in others. What is such a substance called?
- ASaturated
- BIsotonic
- CNeutral
- DAmphoteric
6.ふつう
Water climbs up a narrow glass tube. Which property mainly causes this?
- ALow density of water
- BAdhesion of water to the glass
- CEvaporation of water from the tube
- DWater's high boiling point
7.むずかしい
1 M のHClと 1 M のNaOHを同じ体積ずつ混ぜた。結果のpHはおよそいくつか。
- A14
- B1
- C3.5
- D7
8.むずかしい
Sugar is heated in a pan. Which observation shows that a chemical change, not just a physical change, has happened?
- AIt turns black and gives off water vapour, leaving a solid that is no longer sweet
- BThe crystals become smaller when crushed
- CIt melts into a clear, runny liquid that sets again when it cools
- DIt gets hot to the touch
解答
- 1. D · 各原子がもつ陽子の数
- 2. B · 760 mmHg
- 3. D · 18 族
- 4. C · It raises the boiling point slightly
- 5. D · Amphoteric
- 6. B · Adhesion of water to the glass
- 7. D · 7
- 8. A · It turns black and gives off water vapour, leaving a solid that is no longer sweet
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