20. Which of the following does NOT contain at least one pi bond?(A) H2CO (B) CO2(C) C2H2(D) NO (E)
問題詳情
20. Which of the following does NOT contain at least one pi bond? (A) H2CO (B) CO2 (C) C2H2 (D) NO (E) All of the above (A-D) contain at least one pi bond.