Asked in PMC Practice Test 31 (2021) 2021Moderate

Calcium carbide on reaction with water gives _.

Correct answer: D. Acetylene

  • A. Methane
  • B. Ethane
  • C. Propane
  • D. Acetylene

Explanation

Carbide of alkaline earth metals are decomposed by water to form acetylene (C2H2). E.g: CaC2+ 2H2O ------ Ca(OH)2+ C2H2

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About Alkynes

Alkynes are unsaturated hydrocarbons containing a carbon-carbon triple bond, with sp-hybridised carbon atoms and a linear arrangement around the bond. The content includes nomenclature, preparation, acidity of terminal alkynes, and addition reactions with hydrogen, halogens, hydrogen halides and water, as well as oxidation.

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