Which of the following are produced from coal tar?

Arrange the following pesticides in the chronological order of their release into the market:
$A$: Organophosphates
$B$: Organochlorides
$C$: Sodium chlorate

Potassium metabisulphite is a(an)

Soap is a/an ...... .

Give information on the uses of green chemistry in day-to-day life.

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