No, you would not be able to smell the fart after 10 years. Farts are primarily composed of gases such as nitrogen, carbon dioxide, oxygen, methane, and small amounts of other compounds. These gases disperse and dissipate into the air relatively quickly, especially in an open environment.
In a closed jar, the gases would initially be trapped, but over time, they would likely undergo chemical reactions and break down into other compounds. Additionally, the pressure inside the jar may change, causing the gases to escape or react with the surrounding environment. These factors would further contribute to the loss of the distinctive smell associated with a fart.
Therefore, it is highly unlikely that you would still be able to smell the fart after a prolonged period of time like 10 years.