Question

Choose the correct options regarding the bathing soap and washing soaps:
A.Bathing soaps are potassium salts of long-chain fatty acids. While washing soaps are sodium salts of long-chain fatty acids.
B.Washing soaps are potassium salts of long-chain fatty acids. While bathing soaps are sodium salts of long-chain fatty acids
C.Washing soaps are usually soft. While bathing soaps are usually hard.
D.Bathing soaps are usually soft. While washing soaps are usually hard.

Answer 1

Hint: We know that bathing soaps are the potassium salts of long-chain fatty acids whereas washing soaps which are also called detergents are sodium salts of long-chain fatty acids.

Complete step by step answer:
We know, bathing and washing soaps are different even though both are considered to be a surface-active agent, which means that washing compound mixes with grease and water.
Bathing soaps are potassium salts of long-chain fatty acid and the anionic group present in soap is $ - COO$. Detergents are sodium salts are long-chain fatty acids and the anionic group present is $ - S{O_3}, - OS{O_3}$. Hence option (A) is correct.
Based on the nature of the alkali used in soap production, soaps have different properties. Sodium hydroxide gives hard soap which is used for washing while potassium hydroxide gives soft soap that is used for bathing.
$\therefore $ Option (D) is also correct.

So the answer to this question is option A and D.

Additional Information: We must know the main difference between soap and detergents are:
-Soaps are prepared from vegetable oil and animal fats whereas detergents are prepared from coal and petroleum.
-Soaps are biodegradable while detergents are non-biodegradable.
-Soaps do not easily form lather in hard water but detergents easily form lather in hard water.
-Soaps show weak cleansing action so they cannot be used in acidic water on the other hand detergents show strong cleansing action so they can be used in acidic water.


Note:
We can make soaps from the materials found in nature whereas detergents are synthetic. Detergents soaps were first manufactured at the time of World War II when oils required to produce were scarce.