2001 年
化學 · 共 39 題 · 點擊選項即時核對答案
Which of the following ions is responsible for the yellow colour of topaz ? [Note: Topaz is a yellow coloured gemstone.]
The hazard warning label shown below is found on a compressed gas cylinder.
Which of the following gases may be contained in the cylinder?
Which of the following processes is exothermic?
When potassium carbonate solution and calcium chloride solution are mixed, calcium carbonate is precipitated. Which of the following mixtures would produce the greatest amount of precipitate?
Which of the following statements concerning water is correct?
Which of the following statements concerning the formation of chloride ions from chlorine atoms is correct ?
Which of the following statements concerning uses of plastics is correct?
Consider the reaction: 4H₂(g) + Fe₃O₄(s) → 3Fe(s) + 4H₂O(l) What mass of iron would be obtained if 96.0 cm³ of hydrogen, measured at room temperature and pressure, is consumed in the reaction? (Relative atomic mass: Fe = 56.0; molar volume of gas at room temperature and pressure = 24 dm³)
Which of the following pairs of solutions, when mixed, would produce a precipitate ?
Which of the following processes is NOT involved in the production of ethanol from crude oil?