Question

why is detergent called as soap less soap?

Answer 1

People got used to referring to cleaners having the general characteristics of soap as "soap", whether they contained soap or not. A more accurate term would be "soapless detergent", but sometimes the oxymoron "soapless soap" was used, though I don't know who'd still be using that phrase these days. Mostly people just refer to certain products as "soap" and don't care whether they contain actual soap or not, so you're unlikely to hear "soapless" anything these days except for a few detergent toiletries that want to emphasize their not containing soap -- but they're not going to call themselves any kind of "detergent" (which just means "cleaning" & hence is appropriate for any kind of cleaning compound, including those made of soap) either, because that's developed connotations that make it a place face cleaners or baby wash don't want to go these days.

Answer 2

Explanation:

$<p style ="Color:cyan; font-family: cursive; background:black;font size25px;"> A number of fats and oils are heated and mixed with a liquid alkali to produce soap and water (neat soap) plus glycerine. Fats and oils are hydrolyzed with a high-pressure steam to get crude fatty acids and glycerine. The fatty acids are purified by distillation and neutralized with an alkali to produce soap.$