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Chemistry 2000 WAEC Past Questions

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16
If a solution has a pH of 2, it can be concluded that it
  • A. is a weak electrolyte
  • B. has hyrogen ion concentration of 0.2 mol sm-3
  • C. is twice as acidic as a solution of pH 1,
  • D. will produce effervescence with magnesium ribbon
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17
Which of the following salts is stable to heat?
  • A. K2CO3
  • B. (NH4)2SO4
  • C. NaHCO 3
  • D. AgNO3
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18
Which of the following compounds dissolves in water to give an alkaline solution?
  • A. Ammonium chloride
  • B. Sodium chloride
  • C. Sulphur (IV) oxide
  • D. Potassium oxide
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19
Which of the following salts is stable to heat?
  • A. K 2CO 3
  • B. (NH 4) 2SO 4
  • C. NaHCO3
  • D. AgNO3
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20
What type of reaction is involved when wood shavings produce a brown gas with concentrated HNO3?
  • A. Redox reaction
  • B. Destructive distillation
  • C. Dehydration
  • D. Nutralization
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