Okay, so imagine you have a magic potion that can make you go to sleep really fast. That's what chloroform is! It's a chemical that can make you go to sleep if you breathe it in.
But wait, it's not necessarily a good thing. Chloroform can make you go to sleep so deeply that you might not wake up. This is why doctors don't use it very much anymore.
But a long time ago, doctors did use chloroform to help people who were having surgery. They would put a little bit of chloroform on a cloth and have the patient breathe it in. This would make the patient go to sleep so the doctors could do the surgery without the patient feeling anything.
So chloroform is kind of like a magical potion that can make you go to sleep, but it's also really dangerous if not used in the right way by trained professionals.