Acetylene (C₂H₂)is a Small Organic Molecule Used in the Industrial

question 53

Multiple Choice

Acetylene (C₂H₂) is a small organic molecule used in the industrial preparation of many other molecules and also in welding.Acetylene is made from calcium carbide (CaC₂) and water and produces acetylene and calcium hydroxide.Which of the following choices is the correct balanced chemical equation for the preparation of acetylene?

• A) CaC₂ + H₂O → CaO + C₂H₂
• B) CaC₂ + H₂O → Ca(OH)₂ + C₂H₂
• C) CaC₂ + 2 H₂O → Ca(OH)₂ + C₂H₂
• D) CaC₂ + 2 H₂O → CaO + C₂H₂ + H₂O
• E) 2 CaC₂ + H₂O → Ca(OH)₂ + 2 C₂H₂

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