You don't
no
they find certain chemicals found in that drug like THC in marijuana
Yes, drug screenings do look specifically for drugs such as marijuana.
Wait for 3 months
Saliva drug tests usually detect 3 to 5 days.
The majority of drug tests only test for 5 drugs: marijuana, cocaine, pcp, methamphetamine, and opiates. So unless a drug tests is testing specifically for LSD,(which they typically do not) then LSD will not cause a positive.
Usually. It can also be done by testing hair follicles, and cotton swabs in your mouth. Standard drug tests for marijuana are usually urine tests.
Yes. Marijuana is still marijuana and tests out the same whether it is sold legaly or illegaly. Actually "legal buds" is not marijuana, but a substitute. However, there are drug tests for "synthetic weed" too.
There is no possible way to give an answer to this question.
No
If you did not smoke any marijuana, and you have since washed your hair, you will have no marijuana in or on any of the strains of hair on your head, and it will not show up on any drug tests.
There's no way to pass a drug test if you're doing drugs. That's what drug tests show.