Question

Scouring soaps and soap powder contain soap along with:
a.) Lime
b.) Powdered pumice
c.) $A{l_2}{(S{O_4})_3}$
d.) All of the above

Answer 1

Before attempting this question, one should have prior knowledge about scouring soaps and soap powder which are used to remove dirt, grease due to presence of rough or abrasive material, using this information will help to answer the question.

Complete step by step answer:
Scouring soaps are those soaps that remove dirt, grease and other different scars by rubbing hard whereas soap powder is made from soap and other things we use to wash clothes, especially in a machine. As scouring soap removes scars by rubbing hard, hard scrubbing can only be done if the soap has some rough or abrasive material. Here, abrasives are examples of silica or pumice, builders of sodium carbonate and trisodium phosphate. The scouring soap is meant to rubbed over the surface of the scar with a little water. The abrasive present i.e. pumice or builder removes the dirt by mechanical action, and afterwards is washed away, altogether with the soap, by rinsing with water. However, scouring soaps are only suitable for surfaces where only low abrasion is not that much important, for example, stone floors, metal sinks, stainless steel pans. We can’t clean wood surfaces, painted surfaces and delicate plastics as they are not suitable for cleaning them abrasives of any kind. All scouring soap effects consist mainly of mechanical abrasion of the adhering dirt. So, they develop their effect minerals, which is guaranteed by the abrasive. Thus, all the information above makes us clear that the abrasive scouring soap and soap powder contain soap along is powdered pumice.
So, the correct answer is “Option B”.

Note: Lime is one of the basic building materials used mainly as lime mortar in construction. There are two types of lime:
Hydraulic lime- which sets under the water.
Non- hydraulic lime- which do not set under the water.

Example of non – hydraulic lime is quick lime, fat lime or white lime etc. Quick lime is a form of lime that is manufactured by the burning of stone that contains calcium carbonate. This process is called calcinations. The product that remains after the removal of carbon dioxide in the calcium carbonate is quick lime. The process is as follow:
$CaC{O_3} \to CaO$
(calcium oxide- Quicklime) + $C{O_2}$