Question

Identify the compounds $ A $ and $ B $ in the following reaction sequence. $ Ca{{C}_{2}}(s)+{{H}_{2}}O(l)\xrightarrow{{}}A(g)\xrightarrow[HgS{{O}_{4}}]{{{H}_{2}}S{{O}_{4}}}B(l) $

• A. $ A $ is ethylene, $ B $ is acetaldehyde
• B. $ A $ is acetylene, $ B $ is propionaldehyde
• C. $ A $ is ethane, $ B $ is ethanol
• D. $ A $ is acetylene, $ B $ is acetaldehyde

Answer 1

Answer: (D)

$ Ca{{C}_{2}}(s)+2{{H}_{2}}O(l)\xrightarrow{{}}\underset{\begin{smallmatrix} (A) \\ \downarrow {{H}_{2}}S{{O}_{4}}/HgS{{O}_{4}} \end{smallmatrix}}{\mathop{HC\equiv CH}}\,+Ca{{(OH)}_{2}} $ $ C{{H}_{3}}-CHOC{{H}_{2}}=\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,H $