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Chem Chemistry

ChemistryNEB 2074 (old course) (grade increment)

Identify the major product A and B in the following reaction sequence. CaC2 [H2O] A [ammonical AgNO3] B

2

Answer

· Based on the official syllabus and past papers
Updated

The given reaction sequence involves two steps:

  1. First step: Reaction of calcium carbide with water Calcium carbide () reacts with water () to form acetylene () and calcium hydroxide (). Here, the major product A is acetylene ().
CaC2+22H2OH2Oethyneethyne+Ca(OH)2
Hydrolysis of calcium carbide to form acetylene (ethyne) and calcium hydroxide.
  1. Second step: Reaction of acetylene with ammoniacal silver nitrate Acetylene () reacts with ammoniacal silver nitrate ( in ) to form silver acetylide (), which is a white precipitate. Here, the major product B is silver acetylide ().

Thus, the major products are:

  • A = Acetylene ()
  • B = Silver acetylide ().

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