Chem quest:Compounds from which class usually have offensive odors, such as that of decaying meat or bad breat

Question

Compounds from which class usually have offensive odors, such as that of decaying meat or bad breath?

a.ethers
b.esters
c.ketones
d.alcohols
e.amines

Answer 1

esters tend to be pleasant/fruity

amines (think ammonia) smell like ammonia when gaseous, fishy when liquid.

the other ones tend to not be as smelly.

Answer 2

e.amines