64
An acidic salt has
- A. double anions in its aqueous solution
- B. a single cation in its aqueous solution
- C. hydrogen ions in its aqueous solution
- D. hydrogen atoms in its aqueous solution
65
What is the solubility of a salt if 0.4g of it is obtained on evaporating 200\(cm^{3}\) of its saturated solution to dryness?
- A. 0.08\(gdm^{-3}\)
- B. 2.00\(gdm^{-3}\)
- C. 8.00\(gdm^{-3}\)
- D. 80.00\(gdm^{-3}\)
66
The process of extraction of iron from its ore is
- A. decomposition
- B. oxidation
- C. reduction
- D. sublimation
67
Which of the following equations represents a redox reaction?
- A. \(HNO_{{3}{(aq)}} + NaOH_{(aq)} \to NaNO_{{3}{(aq)}} + H_{2}O_{(l)}\)
- B. \(AgNO_{{3}{(aq)}}+KCl_{(aq)} \to AgCl_{(s)}+KNO_{{3}{(aq)}}\)
- C. \(CaCO_{{3}{(s)}} \to CaO_{(s)} + CO_{{2}{(g)}}\)
- D. \(2H_{2}S_{(s)} + SO_{{2}{(g)}} \to 2HO_{2} + 3S_{(g)}\)
68
Which of the following organic compounds can undergo both addition and substitution reactions?
- A. Pentane
- B. Benzene
- C. Propane
- D. Hexane
69
Which of the following raw materials is used in the plastic industry?
- A. Ethene
- B. Methane
- C. Sulphur
- D. Hydrogen