Which of the following is a bacteriostatic antibiotic?

What is the basic difference between antiseptics and disinfectants?

$A$ mixture of chloroxylenol and terpineol acts as

Which of the following is synthetically modified to obtain $Amoxicillin$?

In the given reaction scheme,$P$ is a phenyl alkyl ether,$Q$ is an aromatic compound; $R$ and $S$ are the major products.
$P$ $\xrightarrow{HI} Q$ $\xrightarrow[\text{(iii) } H_3O^{+}]{\text{(i) } CO_2, \text{(ii) } NaOH} R$ $\xrightarrow[\text{(ii) } H_3O^{+}]{\text{(i) } (CH_3CO)_2O} S$
The correct statement about $S$ is:

In what respect do prontosil and salvarsan resemble? Is there any resemblance between azo dye and prontosil? Explain.