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JAMB Chemistry 2006 Question 14

Question 14

Rates of Reaction

Which of the following typically represents a photochemical reaction?

  1. A.Formation of water from hydrogen and oxygen molecules.
  2. B.Conversion of dinitrogen(IV) oxide to nitrogen(IV) oxide.
  3. C.Decomposition of calcium hydroxide to its oxide.
  4. D.Conversion of silver halides to grey metallic silver.
Show the answer and explanation

Answer: D (Conversion of silver halides to grey metallic silver.)

Explanation

A photochemical reaction is started by light. Silver halides decompose in light to silver (the basis of photography).