1.やさしい
Which property is typical of bases?
- AThey taste sour
- BThey have a pH below 7
- CThey turn blue litmus red
- DThey feel slippery
2.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
3.やさしい
According to the Arrhenius definition, what does an acid produce in water?
- AOxide ions (O²⁻)
- BSodium ions (Na⁺)
- CHydroxide ions (OH⁻)
- DHydrogen ions (H⁺)
4.ふつう
What are London dispersion forces?
- AStrong bonds formed by transferring electrons
- BWeak, temporary attractions caused by shifting electrons in molecules
- CForces that hold protons together in the nucleus
- DAttractions between a hydrogen atom and a metal ion
5.ふつう
Rubbing alcohol evaporates faster than water at room temperature. What does this suggest?
- AIts intermolecular forces are weaker than water's
- BIts intermolecular forces are stronger than water's
- CIts molecules are heavier than water molecules
- DIt has a higher boiling point than water
6.ふつう
氷水の氷が融けている間、温度はどうなるか。
- Aその間ずっと着実に上がる
- B0 °C より下がる
- Cすべての氷が融けるまで 0 °C のままである
- Dすぐに 100 °C まで上がる
7.むずかしい
A piece of copper is placed in zinc sulfate solution. Zinc is more reactive than copper. What happens?
- ANo reaction occurs
- BZinc metal coats the copper and the solution turns blue
- CHydrogen gas is produced
- DCopper replaces zinc, forming copper sulfate
8.むずかしい
Alkanes follow the general formula CₙH₂ₙ₊₂. What is the formula of the alkane with 4 carbon atoms?
- AC₄H₁₀
- BC₄H₁₂
- CC₄H₆
- DC₄H₈
解答
- 1. D · They feel slippery
- 2. C · Safety goggles
- 3. D · Hydrogen ions (H⁺)
- 4. B · Weak, temporary attractions caused by shifting electrons in molecules
- 5. A · Its intermolecular forces are weaker than water's
- 6. C · すべての氷が融けるまで 0 °C のままである
- 7. A · No reaction occurs
- 8. A · C₄H₁₀
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