Chemical castration is the use of medicine designed to reduce desire for sexual activity.

Chemical castration is used mostly in the treatment of sex offenders, in the hopes that the reduced desire for sexual activity will prevent them from further committing crimes.

There is no actual castration; hence the name is a misnomer.

Yes, females can be chemically castrated. Chemical castration is castration by way of drugs.

Yes

Castration of a male is done by surgically removing the testicles and then suturing the incision closed. There is also a chemical method of castration that makes the testicles ineffective.

There are several types of castration. The surgical removal of both the testicles is called a bilateral orchiectomy. This includes a simple castration through the scrotum or a "radical" inguinal orchiectomy which is done from above.

There is also castration done with a clamp that causes the testicles to lose their blood supply. This is only done on animals.

Finally there is chemical castration which involves taking antiandrogens to shut down testicular function.