Which of the following are produced from coal tar?

Potassium metabisulphite is a(an)

Which from the following methods is $\underline{\text{NOT}}$ used to preserve food?

Which of the following enhances the lathering property of soap?

Pick the correct statement among the following:

Which of the following statements are not correct?
$a$) Antihistamine also functions as an antacid
$b$) The shape of an active site of an enzyme does not change when the drug binds to an allosteric site
$c$) Chemical messengers communicate the message between two neurons
$d$) Potassium soaps are hard,while sodium soaps are soft to skin
The correct answer is