When soap is dissolved in hard water,its cleaning ability decreases. This is due to the formation of:

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

Match the soaps given in Column $-I$ with items given in Column $-II$.

Column $-I$	Column $-II$
$A$. Soap chips	$1$. Dried miniature soap bubbles
$B$. Soap granules	$2$. Small broken pieces of soap formed from melted soaps
$C$. Soap powder	$3$. Soap powder $+$ abrasives $+$ builders $(Na_2CO_3, Na_3PO_4)$
$D$. Scouring Soap	$4$. Soap powder $+$ builders like $Na_2CO_3$ and $Na_3PO_4$

Identify the use of the given drug.

Consider the following statements:
Statement-$I$: Shaving soaps contain glycerol to prevent rapid drying.
Statement-$II$: Laundry soaps contain sodium rosinate or sodium silicate as fillers,not sodium carbonate.
Correct answer is:

Which of the following statements are correct?
$a$. Aspartame is sweeter than saccharin
$b$. Shaving soaps contain glycerol to prevent drying
$c$. Salt of sorbic acid is used as a food preservative
$d$. Norethindrone is an example of an antifertility drug