1.やさしい
Which group contains the alkaline earth metals, such as magnesium and calcium?
- AGroup 18
- BGroup 17
- CGroup 1
- DGroup 2
2.やさしい
海面の高さで、純水は何度で沸騰するか。
- A100 °C(212 °F)
- B37 °C(98.6 °F)
- C0 °C(32 °F)
- D50 °C(122 °F)
3.やさしい
Which element makes up the largest share of the human body by mass?
- ANitrogen
- BCarbon
- COxygen
- DHydrogen
4.ふつう
質量が 50 g、体積が 20 cm³ の物体の密度はいくつか。
- A70 g/cm³
- B1000 g/cm³
- C2.5 g/cm³
- D0.4 g/cm³
5.ふつう
A solution has a pH of 2. What is its hydrogen ion concentration?
- A1 × 10² mol/L
- B1 × 10⁻² mol/L
- C1 × 10⁻¹² mol/L
- D2 mol/L
6.ふつう
During digestion, large molecules are broken down by adding water across their bonds. What is this reaction called?
- ACombustion
- BCondensation
- CHydrolysis
- DPolymerisation
7.むずかしい
Why does atomic radius decrease from left to right across a period?
- AMore protons pull the electrons of the same outer shell closer
- BThe atoms lose electrons across the period
- CNeutrons push the electrons outward less strongly
- DEach element adds a new electron shell
8.むずかしい
正しく釣り合っている反応式はどれか。
- A2Na + Cl₂ → NaCl₂
- B2Na + Cl₂ → 2NaCl
- CNa + Cl₂ → NaCl
- DNa + Cl → NaCl₂
解答
- 1. D · Group 2
- 2. A · 100 °C(212 °F)
- 3. C · Oxygen
- 4. C · 2.5 g/cm³
- 5. B · 1 × 10⁻² mol/L
- 6. C · Hydrolysis
- 7. A · More protons pull the electrons of the same outer shell closer
- 8. B · 2Na + Cl₂ → 2NaCl
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