1997 年
化學 · 共 49 題 · 點擊選項即時核對答案
A zinc-carbon cell is connected to a voltmeter as shown in the above diagram. Which of the following statements concerning the set-up is INCORRECT ?
Which of the following graphs best represents the change in mass with time when calcium carbonate is strongly heated ?
Which of the following statements concerning the reaction of aqueous ammonia with hydrochloric acid is correct ?
The formula of a metal carbonate is X₂CO₃. 100 cm³ of a solution containing 0.69 g of the carbonate requires 50 cm³ of 0.20 M hydrochloric acid for complete reaction. What is the relative atomic mass of metal X ? (Relative atomic masses : C = 12.0, O = 16.0)
Which of the following substances, when mixed, would produce a precipitate ?
Which of the following compounds represents the first member of a homologous series ?
Which of the following gases occupies the largest volume at room temperature and pressure ? (Relative atomic masses : H = 1.0, C = 12.0, N = 14.0, O = 16.0; molar volume of gas at room temperature and pressure = 24.0 dm³)
The model shown below represents a compound containing 6 hydrogen atoms (white spheres) and 3 carbon atoms (black spheres)
Which of the following statements concerning the compound is INCORRECT ?
Which of the following compounds CANNOT be produced directly from ethene ?
When a glass of wine is left overnight, it becomes sour. Which of the following reactions is responsible for this change ?