Amoxicillin is a semi-synthetic modification of:

The antiseptic property of iodine is due to:

The number of $-OH$ groups present in the structures of bithionol,terpineol and chloroxylenol is respectively:

Amongst the following compounds,which one is an antacid?

Which of the following are synthetic detergents?
$A$) $CH_3(CH_2)_{10}CH_2OH$
$B$) $CH_3(CH_2)_{10}CH_2OSO_3Na$
$C$) $CH_3(CH_2)_{15}N(CH_3)_3Br$
$D$) $(C_{15}H_{31}COO)_3C_3H_5$

Penicillin is