學校考試中學理科
DSE化學科 Chemistry 題庫｜十二課題溫習攻略
Pickmyquiz
•0.0(0)
4307 題 มัธยม 8/7/2026
題庫簡介
DSE化學科Chemistry題庫，4307題模擬試題，免費線上操練。涵蓋地球物質、微觀世界、金屬、酸與鹼、化學反應速率、化學平衡及氧化還原等必修課題並包括選修單元，兼顧方程式、計算與實驗題。適合DS…
預覽內容
免費體驗 20 題Ammonia is synthesized in the Haber process, involving the following system in equilibrium at temperature T: N₂(g) + 3H₂(g) ⇌ 2NH₃(g) ΔH = -92 kJ mol⁻¹ Explain whether increasing the pressure of the system will give a better yield of ammonia at temperature T. (2 marks) 氨是在哈柏法中合成的，涉及以下在溫度 T 時處於平衡狀態的系統： N₂(g) + 3H₂(g) ⇌ 2NH₃(g) ΔH = -92 kJ mol⁻¹ 解釋在溫度 T 時，增加系統的壓力會否提高氨的產率。（2分）
Solution X is an aqueous solution of a weak organic base, ethylamine (CH₃CH₂NH₂). Solution X is neutralized by standard dilute hydrochloric acid to form a salt Y. If the neutralization is carried out by titration, suggest a suitable indicator to be used. Give the colour change at the end point. 溶液 X 是一種弱有機鹼——乙胺 (CH₃CH₂NH₂) 的水溶液。溶液 X 可被標準稀氫氯酸中和，從而生成鹽 Y。若該中和作用是以滴定法進行，建議在此滴定中使用的一種合適指示劑，並寫出在滴定終點時的顏色變化。
Compound X is a primary alcohol with the chemical formula CH₃CH₂CH₂OH. X is completely oxidized to a carboxylic acid Y by heating with excess acidified potassium dichromate solution under reflux. Acid Y is then neutralized with sodium hydroxide solution. (a) State the IUPAC name of carboxylic acid Y. (1 mark) (b) If 3.6 g of X is completely converted to acid Y, calculate the volume (in cm³) of 0.15 mol dm⁻³ sodium hydroxide solution required to completely neutralize the acid Y formed. (Molar mass of X = 60.0 g mol⁻¹) (2 marks) 化合物 X 是一種一級醇，化學式為 CH₃CH₂CH₂OH。將 X 與過量酸性重鉻酸鉀溶液在回流下加熱，X 會完全氧化成羧酸 Y。然後用氫氧化鈉溶液中和酸 Y。 (a) 寫出羧酸 Y 的系統命名（IUPAC 名稱）。 (1 分) (b) 若 3.6 g 的 X 完全轉化為酸 Y，計算完全中和所生成的酸 Y 所需的 0.15 mol dm⁻³ 氫氧化鈉溶液的體積（以 cm³ 為單位）。（X 的摩爾質量 = 60.0 g mol⁻¹） (2 分)
A glass flask of volume 150 cm³ is completely filled with pure ethanol (C₂H₅OH) at room temperature. Calculate the number of ethanol molecules present in the flask. (Density of ethanol at room temperature = 0.789 g cm⁻³; Avogadro's constant = 6.02 × 10²³ mol⁻¹; Relative atomic masses: H = 1.0, C = 12.0, O = 16.0) 一個體積為 150 cm³ 的玻璃燒瓶在室溫下完全注滿純乙醇 (C₂H₅OH)。計算該燒瓶內乙醇分子的數目。（乙醇在室溫下的密度 = 0.789 g cm⁻³；阿伏加德羅常數 = 6.02 × 10²³ mol⁻¹；相對原子質量：H = 1.0，C = 12.0，O = 16.0）
Sulphur trioxide is manufactured industrially by a process which involves the following system in equilibrium at temperature T. 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) : ΔH = -197 kJ mol⁻¹ Explain how an increase in the total pressure of the system will affect the yield of sulphur trioxide. 三氧化硫是透過工業過程製造的，該過程涉及以下處於溫度 T 的平衡系統。 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) : ΔH = -197 kJ mol⁻¹ 解釋系統總壓強的增加將如何影響三氧化硫的產率。
A volumetric flask is completely filled with 250.0 cm³ of pure liquid ethanol (C₂H₅OH) at room temperature. Calculate the number of ethanol molecules present in the flask. (Density of ethanol at this temperature = 0.789 g cm⁻³, Avogadro's constant = 6.02 × 10²³ mol⁻¹, Relative atomic masses: H = 1.0, C = 12.0, O = 16.0) 一個容量瓶在室溫下完全注滿了 250.0 cm³ 的純液態乙醇 (C₂H₅OH)。計算瓶內存在的乙醇分子數目。 （在該溫度下乙醇的密度 = 0.789 g cm⁻³，阿伏加德羅常數 = 6.02 × 10²³ mol⁻¹，相對原子質量：H = 1.0, C = 12.0, O = 16.0）
A student performed tests on two chemical substances X and Y, and made the following observations. | Test | Observation | | :--- | :--- | | 1: Gas X was passed into an acidified potassium dichromate solution. | The solution turned from orange to green. | | 2: Acidified silver nitrate solution was added to a solution of Y. | A pale yellow precipitate was formed. | Suggest an inorganic gas which could be X. (1 mark) 一名學生對兩種化學物質 X 和 Y 進行測試，並得出以下觀察結果。 | 測試 | 觀察結果 | | :--- | :--- | | 1: 將氣體 X 通入酸化的重鉻酸鉀溶液中。 | 溶液由橙色變成綠色。 | | 2: 將酸化的硝酸銀溶液加入 Y 的溶液中。 | 產生淡黃色沉澱。 | 建議一種可能為 X 的無機氣體。（1 分）
Methanol can be manufactured by an industrial process which involves the following system in equilibrium at temperature T: CO(g) + 2H₂(g) ⇌ CH₃OH(g) : ΔH = -90 kJ mol⁻¹ Explain whether increasing the pressure of the system will give a better yield of methanol at temperature T. 甲醇可透過一涉及以下在溫度 T 處於平衡的系統的工業過程製造： CO(g) + 2H₂(g) ⇌ CH₃OH(g) : ΔH = -90 kJ mol⁻¹ 試解釋增加系統的壓力會否在溫度 T 下提高甲醇的產率。
Methanol can be manufactured by an industrial process which involves the following system in equilibrium at temperature T. CO(g) + 2H₂(g) ⇌ CH₃OH(g) : ΔH = -90 kJ mol⁻¹ What is the effect of increasing the pressure of the system (at constant temperature) on the yield of methanol? Explain your answer. (2 marks) 甲醇可透過工業過程製造，當中涉及以下在溫度 T 的平衡系統。 CO(g) + 2H₂(g) ⇌ CH₃OH(g) : ΔH = -90 kJ mol⁻¹ 增加系統的壓強（在恆溫下）對甲醇的產率有何影響？試加以解釋。（2分）
Calculate the number of atoms in 1 g of ²⁴Mg isotope. (Mass of one atom of ²⁴Mg = 4.0 × 10⁻²³ g) Hence, calculate a value for Avogadro's constant. 計算 1 g 的 ²⁴Mg 同位素中的原子數目。（一個 ²⁴Mg 原子的質量 = 4.0 × 10⁻²³ g） 由此計算阿伏加德羅常數的數值。
The diagram above illustrates the apparatus used for the electrolysis of two solutions. Electrode A is made of copper, and the electrolyte in the first cell is copper(II) sulphate solution. Electrodes B, C and D are all made of graphite. P and Q are the poles of the battery. On completion of the circuit, a reddish-brown solid deposits on electrode B, and gas bubbles are observed at electrodes C and D. Write an ionic equation for the reaction occurring at electrode A. State whether the blue colour of the copper(II) sulphate solution will fade after some time, and explain your answer briefly. (3 marks) 上圖顯示了用於電解兩種溶液的裝置。電極 A 由銅製成，第一個電解池中的電解質是硫酸銅(II)溶液。電極 B、C 和 D 均由石墨製成。P 和 Q 是電池的極。 接通電路後，電極 B 上有紅棕色固體沉積，而電極 C 和 D 上則觀察到有氣泡產生。 寫出在電極 A 發生的反應的離子方程式。指出硫酸銅(II)溶液的藍色在一段時間後會否變淡，並簡略解釋你的答案。（3 分）
The diagram above illustrates the apparatus used for the electrolysis of two solutions. Electrode A is made of metal Z. The formula of the nitrate of metal Z is Z(NO₃)₂. Electrodes B, C and D are all made of graphite. P and Q are the poles of the battery. On completion of the circuit, metal Z begins to deposit on electrode B, and gas bubbles begin to appear above electrodes C and D. After the passage of a current of 2.5 amperes for 12 minutes 52 seconds, 0.654 g of metal Z is deposited on electrode B. Calculate the relative atomic mass of metal Z. (1 faraday = 96500 coulombs) (3 marks) 上圖顯示用於電解兩種溶液的裝置。電極 A 由金屬 Z 製成。金屬 Z 的硝酸鹽化學式為 Z(NO₃)₂。電極 B、C 和 D 均由石墨製成。P 和 Q 為電池的極。 接通電路後，金屬 Z 開始在電極 B 上沉積，而電極 C 和 D 上方開始出現氣泡。 通過 2.5 安培的電流 12 分鐘 52 秒後，有 0.654 克金屬 Z 沉積在電極 B 上。計算金屬 Z 的相對原子質量。（1 法拉第 = 96500 庫侖）（3 分）
Calculate the number of atoms in 1 g of ²⁴Mg isotope. (Mass of one atom of ²⁴Mg = 4 × 10⁻²³ g) Hence calculate a value for Avogadro's Number. 計算 1 g 的 ²⁴Mg 同位素中的原子數目。（一粒 ²⁴Mg 原子的質量 = 4 × 10⁻²³ g）由此計算阿伏加德羅常數的數值。
Sulfur trioxide can be manufactured by the Contact process which involves the following system in equilibrium at temperature T. 2SO₂ (g) + O₂ (g) ⇌ 2SO₃ (g) : ΔH = -197 kJ mol⁻¹ What is the effect of decreasing the temperature on the yield of sulfur trioxide? 三氧化硫可透過接觸法製造，此過程涉及以下在溫度 T 時處於平衡狀態的系統。 2SO₂ (g) + O₂ (g) ⇌ 2SO₃ (g) : ΔH = -197 kJ mol⁻¹ 降低溫度對三氧化硫的產率有何影響？
For each of the following pairs of oxides: - carbon monoxide and carbon dioxide - sulphur dioxide and sulphur trioxide State the conditions under which the lower oxide may be converted to the higher oxide. 就以下每對氧化物： - 一氧化碳和二氧化碳 - 二氧化硫和三氧化硫 指出能將較低氧化態的氧化物轉化為較高氧化態的氧化物所需的條件。
A student performed tests on two chemical substances X and Y, and made the following observations: | Test | Observation | |---|---| | I: Gas X was passed into an acidified potassium dichromate solution. | The solution turned from orange to green. | | II: Lead(II) nitrate solution was added to a solution of Y. | A white precipitate was formed. | Suggest two anions in aqueous solution, other than the chloride ion, which would give a white precipitate with lead(II) nitrate solution. (2 marks) 一名學生對兩種化學物質 X 和 Y 進行測試，並得出以下觀察結果： | 測試 | 觀察結果 | |---|---| | I：將氣體 X 通入酸化重鉻酸鉀溶液中。 | 溶液由橙色變為綠色。 | | II：將硝酸鉛(II)溶液加入 Y 溶液中。 | 產生白色沉澱物。 | 試建議兩種水溶液中的陰離子（氯離子除外），它們會與硝酸鉛(II)溶液產生白色沉澱物。（2分）
Ammonia is manufactured by the Haber process which involves the following system in equilibrium at a specific temperature T. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) : ΔH = -92 kJ mol⁻¹ Finely divided iron is used as a catalyst in this process. What is the purpose of using a catalyst? Explain what effect the catalyst will have on the equilibrium yield of ammonia. (2 marks) 氨是透過哈柏法製造的，該過程涉及以下在特定溫度 T 下的平衡系統。 N₂(g) + 3H₂(g) ⇌ 2NH₃(g) : ΔH = -92 kJ mol⁻¹ 在此過程中，微細分裂的鐵被用作催化劑。使用催化劑的目的是甚麼？解釋催化劑對氨的平衡產率有何影響。（2 分）
A mixture of solid ammonium chloride and solid calcium hydroxide is heated. The colourless gas Y formed is separately dissolved in water and in methylbenzene (toluene) using an inverted funnel. Some properties of the resulting solutions are listed as follows: (a)(i) State the name of gas Y. (1 mark) 將固態氯化銨與固態氫氧化鈣的混合物加熱。所生成的無色氣體 Y 分別使用倒置漏斗溶解在水和甲基苯（甲苯）中。所得溶液的一些性質如下表所示： (a)(i) 寫出氣體 Y 的名稱。（1 分）
Concentrated sulphuric acid is slowly added to solid sodium chloride. The colourless gas X formed is separately dissolved in water and in methylbenzene (toluene) using an inverted funnel. Some properties of the resulting solutions are listed in the table below. Identify gas X. Explain why the solution of gas X in water conducts electricity while its solution in methylbenzene does not. (3 marks) 將濃硫酸緩慢加入固體氯化鈉中。所生成的無色氣體X分別使用倒置漏斗溶解在水和甲基苯（甲苯）中。所得溶液的一些性質如下表所示。 指出氣體X。解釋為什麼氣體X的水溶液能導電，而其在甲基苯中的溶液卻不能導電。（3分）
A 480 cm³ flask is filled with pure carbon dioxide gas at room temperature and pressure. How many carbon dioxide molecules are there in the flask? (Assume the molar volume of a gas at room temperature and pressure = 24.0 dm³ mol⁻¹, Avogadro's constant = 6.02 × 10²³ mol⁻¹) 一個 480 cm³ 的燒瓶在室溫和常壓下充滿了純二氧化碳氣體。該燒瓶內有多少個二氧化碳分子？ （假設在室溫和常壓下氣體的摩爾體積 = 24.0 dm³ mol⁻¹，阿佛加德羅常數 = 6.02 × 10²³ mol⁻¹）
考生最常中伏嘅題目
根據本題庫 1022 題、累計 34,000 次真實作答統計，以下選項最多考生揀錯——溫習時特別留神。
1
Consider the following equilibrium involving copper(II) complexes. The hexahydrate complex…
最多人誤揀：(2) and (3) only 只有(2)和(3)
30% 作答者揀咗呢個錯誤選項 · 此題累計 69 次作答
2
Methane (CH₄) exists as a gas at room temperature and pressure because. 甲烷 (CH₄) 在室溫和常壓下以氣…
最多人誤揀：Methane is a simple molecular substance. 甲烷是簡單分子物質。
42% 作答者揀咗呢個錯誤選項 · 此題累計 38 次作答
3
Directions: Each question below (Questions Nos. 32 – 38) consists of two statements. Decid…
最多人誤揀：1st statement: False, 2nd statement: True 第一個陳述句：錯誤，第二個陳述句：正…
36% 作答者揀咗呢個錯誤選項 · 此題累計 39 次作答
4
Referring to the above diagram, which of the following changes would occur when a current …
最多人誤揀：Hydrogen gas is produced at X and oxygen gas is produced at …
32% 作答者揀咗呢個錯誤選項 · 此題累計 41 次作答
5
Which of the following methods can be used to distinguish between solid potassium carbonat…
最多人誤揀：(2) and (3) only (2)和(3) மட்டுமே
33% 作答者揀咗呢個錯誤選項 · 此題累計 40 次作答
想知每題正確答案同詳細解析？下載 App 免費試用，答錯嘅題目會自動收集等你重溫。
使用者評價
0.0•0 則評價
尚無評價
成為第一個評價這個題庫的使用者
