1.やさしい
化学変化はどれか。
- A氷が溶ける
- B砂糖が紅茶に溶ける
- C木が燃える
- Dガラスが割れる
2.やさしい
現代の周期表では、元素はどのように並べられているか。
- A原子番号の順
- B元素記号のアルファベット順
- C中性子数の順
- D発見された日付の順
3.やさしい
What does the octet rule state?
- AAn atom can form a maximum of 8 covalent bonds
- BAtoms tend to gain, lose or share electrons to get 8 outer electrons
- CEvery stable atom has exactly 8 protons in its nucleus
- DEvery stable molecule contains exactly 8 atoms
4.ふつう
Which bond joins amino acids together in a protein?
- AAn ionic bond
- BA glycosidic bond
- CA peptide bond
- DA hydrogen bond
5.ふつう
A reaction is at equilibrium. More of one reactant is added. According to Le Chatelier's principle, what happens?
- AThe reaction stops completely
- BThe equilibrium shifts toward the products
- CThe equilibrium shifts toward the reactants
- DNothing changes
6.ふつう
How is 0.00045 written in scientific notation?
- A4.5 × 10⁻⁴
- B4.5 × 10⁻⁵
- C4.5 × 10⁻³
- D4.5 × 10⁴
7.むずかしい
How many millilitres of 0.2 M NaOH are needed to neutralise 25 mL of 0.1 M HCl?
- A50 mL
- B12.5 mL
- C5 mL
- D25 mL
8.むずかしい
Ethanol (CH₃CH₂OH) and dimethyl ether (CH₃OCH₃) have the same formula, C₂H₆O, but ethanol boils at a much higher temperature. Why?
- ADimethyl ether is ionic and ethanol is covalent
- BEthanol molecules are heavier than dimethyl ether molecules
- CEthanol has an O–H group, so its molecules form hydrogen bonds with each other
- DEthanol has more carbon atoms
解答
- 1. C · 木が燃える
- 2. A · 原子番号の順
- 3. B · Atoms tend to gain, lose or share electrons to get 8 outer electrons
- 4. C · A peptide bond
- 5. B · The equilibrium shifts toward the products
- 6. A · 4.5 × 10⁻⁴
- 7. B · 12.5 mL
- 8. C · Ethanol has an O–H group, so its molecules form hydrogen bonds with each other
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