2007 年
化學 · 共 49 題 · 點擊選項即時核對答案
Which of the following pairs of aqueous solutions can be distinguished by using dilute hydrochloric acid ?
Which of the following substances has a sharp boiling point ?
X is an element in the Periodic Table and X⁺ ion has an electronic arrangement of 2, 8, 8. Which of the following statements concerning X is correct ?
Which of the following statements concerning members of a homologous series is correct ?
Metal Y and calcium are both in the same group of the Periodic Table. When equal mass of Y and calcium respectively reacts with excess hydrochloric acid under the same condition, Y gives more hydrogen than calcium does. Which of the following deductions is correct ?
Which of the following processes would be involved in order to separate Cu²⁺(aq) ions from a mixture containing Cu²⁺(aq) and K⁺(aq) ions ?
X, Y and Z are metals. The table below shows the observations when each of them is put into copper(II) sulphate solution :
| Metal | Observation |
|---|---|
| X | no observable change |
| Y | brown solid formed and colourless gas evolved |
| Z | brown solid formed |
Which of the following arrangements correctly represents the ascending order of reactivity of the metals ?
What is the systematic name of the following compound ?
Which of the following items can be made from polystyrene ?
Which of the following suggestions for storing chemicals is acceptable ?