1.やさしい
What should a student always wear to protect the eyes when working with chemicals?
- AReading glasses
- BContact lenses
- CSafety goggles
- DSunglasses
2.やさしい
How does increasing the concentration of a reactant in solution usually affect the reaction rate?
- AThe reaction stops
- BThe rate decreases
- CThe rate stays the same
- DThe rate increases
3.やさしい
原子間で電子が共有されるときにできる結合はどれか。
- A核結合
- B共有結合
- C金属結合
- Dイオン結合
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
- B0.4 g/cm³
- C2.5 g/cm³
- D1000 g/cm³
5.ふつう
The amino acid glycine has an –NH₂ group and a –COOH group. What are these two groups called?
- AAn amino group and a carboxyl group
- BA phosphate group and a hydroxyl group
- CA hydroxyl group and a methyl group
- DA carbonyl group and an ester group
6.ふつう
Zn + 2HCl → ZnCl₂ + H₂ は、どの種類の反応か。
- A分解
- B複分解
- C単置換
- D合成
7.むずかしい
Why is it easier to remove the outer electron from a potassium atom than from a lithium atom?
- APotassium's outer electron is in a full shell
- BPotassium's outer electron is farther from the nucleus and more shielded by inner electrons
- CLithium has more electron shells than potassium
- DPotassium has fewer protons, so its nucleus pulls much more weakly on every electron
8.むずかしい
H₂ 2 mol と O₂ 2 mol を混ぜ、2H₂ + O₂ → 2H₂O のように反応させた。限定反応物はどれか。
- A水。生成物だから
- B水素。H₂ 2 mol は O₂ 1 mol しか使わないから
- Cどちらでもない。量が等しいから
- D酸素。水素より酸素のほうが少ないから
解答
- 1. C · Safety goggles
- 2. D · The rate increases
- 3. B · 共有結合
- 4. C · 2.5 g/cm³
- 5. A · An amino group and a carboxyl group
- 6. C · 単置換
- 7. B · Potassium's outer electron is farther from the nucleus and more shielded by inner electrons
- 8. B · 水素。H₂ 2 mol は O₂ 1 mol しか使わないから
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