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What are lyophilic and lyophobic sols? Give one example of eac
Chemistry Part-I
Chemistry Part-I

Class 12

NCERT

Publisher:
NCERT
Subject:
Chemistry
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Chapter 2: Solutions

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3

Chapter 3: Electrochemistry

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4

Chapter 4: Chemical Kinetics

40 questions

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5

Chapter 5: Surface Chemistry

27 questions

Q1
How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium?
Q2
What are lyophilic and lyophobic sols? Give one example of each type. Why are hydrophobic sols easily coagulated?
Q3
What is the difference between multimolecular and macromolecular colloids? Give one example of each. How are associated colloids different from these two types of colloids?
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6

Chapter 6: General Principles and Processes of Isolation of Elements

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7

Chapter 7: The p-Block Elements

62 questions

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8

Chapter 8: The d-and f-Block Elements

48 questions

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9

Chapter 9: Coordination Compounds

38 questions

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What are lyophilic and lyophobic sols? Give one example of each type. Why are hydrophobic sols easily coagulated?

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Updated on: Jun 17, 2023

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Chemistry Part-I (NCERT)

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In lyophilic sols, the dispersed phase particles have great affinity (or love) for the dispersion medium. These sols are reversible. Examples include gum, gelatin, starch, proteins and rubber etc.

In lyophobic sols, the dispersed phase particles have no affinity (or love) for the dispersion medium. These sols are irreversible. Examples include solutions of metals such as gold and silver, metal hydroxides and metal sulphides.

The hydrophobic sols are less stable and easily coagulated than hydrophilic sols because, the stability of  hydrophobic sols is due to charge only and the stability of hydrophilic sols is due to charge and solvation/ hydration.
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Question Text
What are lyophilic and lyophobic sols? Give one example of each type. Why are hydrophobic sols easily coagulated?
Updated OnJun 17, 2023
TopicSurface Chemistry
SubjectChemistry
ClassClass 12
Answer TypeText solution:1 Video solution: 1
Upvotes192
Avg. Video Duration13 min