1995 年
化學 · 共 49 題 · 點擊選項即時核對答案
Which of the following diseases is NOT associated with the excessive drinking of alcohol?
The formula below can be used to represent the structure of some polymers.
Which of the following combinations is INCORRECT ?
| X | Name of polymer | |
|---|---|---|
| H | Polyethene | |
| Cl | Polyvinyl chloride | |
| CH₃ | Perspex | |
| C₆H₅ | Polystyrene |
Which of the following substances can cause acid rain?
Consider the following equation : 2 FeSO₄·7H₂O(x) → Fe₂O₃(y) + SO₃(z) + SO₂(g) + 14 H₂O(ℓ) Which of the following combinations is correct?
| x | y | z | |
|---|---|---|---|
| aq | s | g | |
| aq | s | ℓ | |
| s | aq | s | |
| s | s | g |
Which of the following methods is NOT used to preserve food?
Which of the following elements is a semi-metal?
A certain amount of silver oxide is heated in a test tube. Which of the following graphs represents the correct plot of the mass of the contents of the test tube against time?
In the Haber process, the following reaction occurs: N₂(g) + 3 H₂(g) ⇌ 2 NH₃(g) ΔH = −92 kJ mol⁻¹ Which of the following statements concerning this reaction is correct?
Questions 30 and 31 refer to the following chemical equation: Fe₂O₃(s) + 3 CO(g) → 2 Fe(s) + 3 CO₂(g)
Which of the following statements is / are correct?
Questions 30 and 31 refer to the following chemical equation: Fe₂O₃(s) + 3 CO(g) → 2 Fe(s) + 3 CO₂(g)
What volume of carbon dioxide, measured at room temperature and pressure, is produced if 224 g of iron are formed? (Relative atomic mass : Fe = 56.0; molar volume of gas at room temperature and pressure = 24 dm³)