Question

Cleaning action of soap occurs because: (a) non-polar tails of soap molecules dissolve in grease (b) oil and grease dissolved into hydrophilic centres of soap micelles acid washed away (c) hydrophilic head dissolve in grease (d) grease dissolve in soap solution

Name: Problem 50, Chapter 11: Problems in Physical Chemistry for JEE
Uploaded: 2021-09-08T02:37:56-08:00
Duration: 9 min 29 s
Channel: Shalini Tyagi
Description: Cleaning action of soap occurs because: (a) non-polar tails of soap molecules dissolve in grease (b) oil and grease dissolved into hydrophilic centres of soap micelles acid washed away (c) hydrophilic head dissolve in grease (d) grease dissolve in soap solution

   Cleaning action of soap occurs because:
(a) non-polar tails of soap molecules dissolve in grease
(b) oil and grease dissolved into hydrophilic centres of soap micelles acid washed away
(c) hydrophilic head dissolve in grease
(d) grease dissolve in soap solution

Problems in Physical Chemistry for JEE

Narendra Avasthi 7th Edition

Chapter 11, Problem 50

Instant Answer

Solved by Expert Shalini Tyagi

09/08/2021

Step 1

The hydrocarbon part is also known as the non-polar part and the hydrophilic part is also known as the polar part. Show more…

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Cleaning action of soap occurs because: (a) non-polar tails of soap molecules dissolve in grease (b) oil and grease dissolved into hydrophilic centres of soap micelles acid washed away (c) hydrophilic head dissolve in grease (d) grease dissolve in soap solution

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Key Concepts

Amphiphilic Molecules

Amphiphilic molecules possess both hydrophobic and hydrophilic parts. This dual nature allows soap molecules to interact with non-polar substances like grease through their hydrophobic tails, while their hydrophilic heads remain in contact with water, enabling the removal of oils from surfaces.

Micelles

Micelles are organized aggregates of soap molecules that form when the concentration of soap in water exceeds a critical threshold. In a micelle, the hydrophobic tails cluster inward to trap grease and oils, while the hydrophilic heads face outward towards the water, effectively emulsifying and dispersing the grease for easy cleaning.

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