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Chemistry 2025 WAEC Past Questions

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11

Sodium chloride is used in the following processes except

  • A. treatment of water
  • B. manufacturing of chloride
  • C. preservation of food
  • D. separation of soap glycerol
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12

Which of the following bonds is not an intermolecular force?

  • A. Hydrogen bond
  • B. Van der waal's
  • C. dipole-dipole
  • D. metallic bond
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13

All the following compounds are ionic except

  • A. AgCl
  • B. KNO\(_3\)
  • C. NO\(_2\)
  • D. (NH\(_4\))\(_2\)CO\(_3\)
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14

The metal carbonate that would not decompose when heated strongly is

  • A. Al\(_2\)CO\(_3\)
  • B. CaCO\(_3\)
  • C. MgCO\(_3\)
  • D. Na\(_2\)CO\(_3\)
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15

In the use of a universal indicator, red colour is an indication that the substance is a 

  • A. concentrated acid
  • B. concentrated alkali
  • C. dilute acid
  • D. dilute base
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