Question

Trevor watches as a freight train passes. He counts eight identical black railroad cars, then a red car, followed by several more black cars. Which type of organic compound does the train most closely model?

A-an alkyl halide
B-an aldehyde
C-an ether
D-a carboxylic acid

Answer 1

D : a carboxylic acid

Answer 2

Answer is: C-an ether.

Ethers are an organic compounds that contain an oxygen atom connected to two alkyl or aryl groups, the general structure of an ether is R-O-R' (R and R' are any alkyl or aryl substituent).
In this example black railroad cars are carbon atoms and one red railroad car is oxygen atom.