JEE Main Chemistry question

Chemistry Chemistry in Everyday Life JEE Main

Not in JEE Main or NEET syllabus

Which of the following is known as invert soap?

(A)Pentaerythritol monostearate
(B)Sodium stearyl sulphate
(C)Trimethyl stearyl ammonium bromideCorrect
(D)Ethoxylated nonylphenol

Answer: (C)

Solution

In ordinary soap the cation (Na/K) is small and the anion is the surface-active (long-chain) part; in trimethylstearylammonium bromide this is reversed — the large, long-chain cation is the surface-active part and the anion (Br) is small — so it is called an invert

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Question ID VK-151650