For numbers 11 and 12: Acetone is an example of a carbonyl compound. Below is the structural formula of acetone.

11. How many types of bonds are there in this compound?
A. 1
B. 2
C. 3
D. 4

12 . What part of the structural formula clearly indicates that acetone is a carbonyl compound?
A. the presence of single bond (-)
B. the presence of double bond (=)
C. the presence of three carbon (C) atoms
D. the presence of a functional group of carbon double bonded to oxygen (C=O)​