1995 年
化學 · 共 49 題 · 點擊選項即時核對答案
A student tries to electroplate an iron ring with nickel using the set-up shown below.
Which of the following combinations is correct?
| Solution X | Anode | Cathode | |
|---|---|---|---|
| iron(II) sulphate solution | iron ring | nickel rod | |
| iron(II) sulphate solution | nickel rod | iron ring | |
| nickel(II) sulphate solution | iron ring | nickel rod | |
| nickel(II) sulphate solution | nickel rod | iron ring |
Which of the following pairs of solutions, when mixed, would give a neutral solution?
The reaction of cane sugar and concentrated sulphuric acid may be represented by the following equation. C₁₂H₂₂O₁₁(s) —conc. H₂SO₄→ 12 C(s) + 11 H₂O(ℓ) In this reaction, concentrated sulphuric acid acts as
A mixture consists of two solids, sodium chloride and lead(II) oxide. Which of the following methods can be used to remove the sodium chloride from the mixture?
The structural formula of a certain compound is shown below.
The name of this compound is
What volume of water is required to dilute 100 cm³ of 8 M hydrochloric acid to a concentration of 2 M?
Compound X is a white solid. When X is warmed with sodium hydroxide solution, a gas is evolved which turns moist red litmus paper blue. When chlorine water is added to an aqueous solution of X, a brown solution is formed. X is probably
Metal X reacts with dilute hydrochloric acid to liberate hydrogen, but metal Y and metal Z have no reaction with the dilute acid. The oxide of metal Y decomposes on heating but the oxide of metal Z does not. Which of the following arrangements represents the order of increasing reactivity of the three metals?
Which of the following is a common use of ammonium nitrate?
Which of the following statements concerning alkenes is INCORRECT ?