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In the above experiment, the litmus paper will initially

Chemistry
JAMB 1983

In the above experiment, the litmus paper will initially

  • A. be bleached
  • B. turn green
  • C. turn red
  • D. turn blue
  • E. turn black
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Correct Answer: Option D
Explanation

When ammonium chloride is heated, it decomposes into ammonia (NH\(_3\)) and hydrogen chloride (HCl) gas, causing damp neutral or red litmus paper to initially turn blue. This happens because the lighter ammonia gas diffuses faster and reaches the damp paper first, dissolving to form an alkaline solution. 


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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