Which of the following plants is useful for extracting an analgesic compound?

Sleeping pills are recommended by doctors to patients suffering from sleeplessness,but it is not advisable to take their doses without consultation with a doctor. Why?

Which of the following is an artificial sweetening agent?

An antibiotic contains a nitro group attached to an aromatic nucleus. It is:

Which of the following molecules contain a sulphur atom in their structures?
$I$. Morphine
$II$. Heroin
$III$. Penicillin
$IV$. Terpineol
$V$. Cimetidine

Identify the use of antipyretic drugs.