1.やさしい
What does the octet rule state?
- AEvery stable molecule contains exactly 8 atoms
- BAn atom can form a maximum of 8 covalent bonds
- CAtoms tend to gain, lose or share electrons to get 8 outer electrons
- DEvery stable atom has exactly 8 protons in its nucleus
2.やさしい
What is the change from a gas to a liquid called?
- ACondensation
- BSublimation
- CFreezing
- DEvaporation
3.やさしい
What does the rule "like dissolves like" mean?
- AEvery substance dissolves in water
- BSolids dissolve only in other solids
- COnly substances with identical formulas can ever dissolve in each other
- DPolar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar ones
4.ふつう
Which statement describes a saturated fat?
- AIt is always liquid at room temperature
- BIts fatty acid chains have no carbon–carbon double bonds
- CIt contains no carbon atoms
- DIts fatty acid chains have many carbon–carbon double bonds
5.ふつう
In the ideal gas law, PV = nRT, what does n stand for?
- AThe number of moles of gas
- BThe number of atoms per molecule
- CThe density of the gas
- DThe number of molecules of gas
6.ふつう
AgNO₃ + NaCl → AgCl + NaNO₃ は、どの種類の反応か。
- A分解
- B複分解
- C燃焼
- D単置換
7.むずかしい
反応式 N₂ + 3H₂ → 2NH₃ で、水素が過剰にあるとき、N₂ 1 mol からアンモニア(17 g/mol)は何グラムできるか。
- A17 g
- B28 g
- C51 g
- D34 g
8.むずかしい
In the reaction 2Na + Cl₂ → 2NaCl, which substance is the oxidising agent?
- ANa
- BNaCl
- CCl₂
- DNa⁺
解答
- 1. C · Atoms tend to gain, lose or share electrons to get 8 outer electrons
- 2. A · Condensation
- 3. D · Polar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar ones
- 4. B · Its fatty acid chains have no carbon–carbon double bonds
- 5. A · The number of moles of gas
- 6. B · 複分解
- 7. D · 34 g
- 8. C · Cl₂
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