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When sodium chloride and metallic sodium are each dissolved in water

Chemistry
JAMB 1978

When sodium chloride and metallic sodium are each dissolved in water

  • A. both processes are exothermic
  • B. both processes are endothermic
  • C. the dissolution of metallic sodium is endothermic
  • D. the dissolution of metallic sodium is exothermic
  • E. the dissolution of sodium chloride is explosive
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Correct Answer: Option D
Explanation

When small quantities of sodium metal is added to water, there is an exothermic reaction, and they react to form sodium hydroxide and hydrogen.

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