D'après wikipedia:
Use of chloroform as an incapacitating agent has become widely recognized, bordering on clichéd, due to the popularity of crime fiction authors having criminals use chloroform-soaked rags to render victims unconscious. However, it is nearly impossible to incapacitate someone using chloroform.[34] It takes at least 5 minutes of inhaling an item soaked in chloroform to render a person unconscious.
Résumé: Non, c'est pas possible