1.やさしい
What does the rate of a reaction measure?
- AHow hot the reaction gets
- BHow quickly reactants are used up or products are formed
- CHow much product forms in total by the end
- DHow much energy the final products contain
2.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
3.やさしい
水の化学式はどれか。
- AH₂O₂
- BH₂O
- COH
- DHO₂
4.ふつう
Which coefficients balance __Na + __Cl₂ → __NaCl?
- A1, 1, 1
- B2, 1, 2
- C2, 2, 1
- D1, 2, 1
5.ふつう
Which substance is a non-electrolyte when dissolved in water?
- ASodium chloride
- BHydrochloric acid
- CGlucose
- DPotassium chloride
6.ふつう
How many molecules are in 2 mol of carbon dioxide?
- A1.20 × 10²⁴
- B2.00 × 10²³
- C6.02 × 10²³
- D3.01 × 10²³
7.むずかしい
In the reaction NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq), which ions are spectator ions?
- ANa⁺ and Cl⁻
- BNa⁺ and NO₃⁻
- CAg⁺ and Cl⁻
- DAg⁺ and NO₃⁻
8.むずかしい
Starch and cellulose are both made entirely of glucose units, yet humans can digest starch but not cellulose. Why?
- ACellulose is really made of amino acids, not glucose, so stomach acid cannot break it
- BStarch contains nitrogen, which makes it easier to digest
- CCellulose dissolves in water, so it is lost from the gut
- DThe glucose units are linked differently, and humans lack an enzyme to break cellulose's links
解答
- 1. B · How quickly reactants are used up or products are formed
- 2. B · 共有結合
- 3. B · H₂O
- 4. B · 2, 1, 2
- 5. C · Glucose
- 6. A · 1.20 × 10²⁴
- 7. B · Na⁺ and NO₃⁻
- 8. D · The glucose units are linked differently, and humans lack an enzyme to break cellulose's links
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