How many pi bonds are present in the molecule C₄H₆O?

• A. 1
• B. 3
• C. 4
• D. 2

Answer: (B)

Verified step by step guidance

1. Identify the types of bonds present in the molecule C₄H₆O. A pi bond is typically found in double and triple bonds.
2. Draw the Lewis structure of the molecule C₄H₆O to visualize the arrangement of atoms and bonds. This will help in identifying the presence of double or triple bonds.
3. Count the number of double and triple bonds in the Lewis structure. Each double bond contains one pi bond, and each triple bond contains two pi bonds.
4. Sum the pi bonds from all the double and triple bonds identified in the structure.
5. Verify the total number of pi bonds by ensuring that the structure adheres to the valency rules of carbon, hydrogen, and oxygen, and that all atoms have complete octets where applicable.