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Which of the following is not correctly matched?
  • a)
    Gelatain - Lyophilic colloid
  • b)
    Gold sol - Lyophilic colloid
  • c)
    Arsenious sulphide - Lyophobic colloid
  • d)
    Ferric hydroxide - Lyophobic colloid
Correct answer is option 'B'. Can you explain this answer?
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Which of the following is not correctly matched?a)Gelatain - Lyophilic...
Gold sol is a Lyophilic colloid.
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Which of the following is not correctly matched?a)Gelatain - Lyophilic...
Lyophilic and Lyophobic colloids

Colloids are heterogeneous mixtures in which the dispersed particles have a size range of 1 nm to 1000 nm. They can be classified into two types based on the interactions between the dispersed phase and continuous phase: Lyophilic and Lyophobic colloids.

Lyophilic colloids are those in which the dispersed phase has a strong affinity for the continuous phase. They are also known as reversible sols because they can be easily converted into gels by changing the conditions such as temperature, pressure, etc. Examples of Lyophilic colloids include gelatin and starch.

Lyophobic colloids are those in which the dispersed phase has no affinity for the continuous phase. They are also known as irreversible sols because they cannot be easily converted into gels. Examples of Lyophobic colloids include arsenic sulfide and ferric hydroxide.

Answer explanation

Gold sol is a type of Lyophilic colloid in which gold particles are dispersed in water. Hence, option B is not correctly matched, and it is the correct answer.
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Read the passage given below and answer the following questions:Some colloids are stable by their nature, i.e., gels, alloys, and solid foams. Gelatin and jellies are two common examples of a gel. The solid and liquid phases in a gel are interspersed with both phases being continuous. In most systems, the major factor influencing the stability is the charge on the colloidal particles. If a particular ion is preferentially adsorbed on the surface of the particles, the particles in suspension will repel each other, thereby preventing the formation of aggregates that are larger than colloidal dimensions. The ion can be either positive or negative depending on the particular colloidal system, i.e., air bubbles accumulate negative ions, sulphur particles have a net negative charge in a sulphur sol, and the particles in a metal hydroxide sol are positively charged. Accumulation of charge on a surface is not an unusual phenomenon-dust is attracted to furniture surfaces by electrostatic forces. When salts are added to lyophobic colloidal systems the colloidal particles begin to form larger aggregates and a sediment forms as they settle. This phenomenon is called flocculation, and the suspension can be referred to as flocculated, or colloidally unstable. If the salt is removed, the suspension can usually be restored to its original state; this process is called deflocculation or peptization. The original and restored colloidal systems are called deflocculated, peptized, or stable sols. Why does a small amount of salt have such a dramatic effect on the stability of a lyophobic colloidal system? The answer lies in an understanding of the attractive and repulsive forces that exist between colloidal particles. Van der Waals forces are responsible for the attractions, while the repulsive forces are due to the surface charge on the particles. In a stable colloid, the repulsive forces are of greater magnitude than the attractive forces. The magnitude of the electrical repulsion is diminished by addition of ionized salt, which allows the dispersed particles to aggregate and flocculate. River deltas provide an example of this behaviour. A delta is formed at the mouth of a river because the colloidal clay particles are flocculated when the freshwater mixes with the salt water of the oceanQ. The particles in suspension will repel each other, thereby preventing the formation of aggregates that are larger than colloidal dimensions. This statement explains

Read the passage given below and answer the following questions:Some colloids are stable by their nature, i.e., gels, alloys, and solid foams. Gelatin and jellies are two common examples of a gel. The solid and liquid phases in a gel are interspersed with both phases being continuous. In most systems, the major factor influencing the stability is the charge on the colloidal particles. If a particular ion is preferentially adsorbed on the surface of the particles, the particles in suspension will repel each other, thereby preventing the formation of aggregates that are larger than colloidal dimensions. The ion can be either positive or negative depending on the particular colloidal system, i.e., air bubbles accumulate negative ions, sulphur particles have a net negative charge in a sulphur sol, and the particles in a metal hydroxide sol are positively charged. Accumulation of charge on a surface is not an unusual phenomenon-dust is attracted to furniture surfaces by electrostatic forces. When salts are added to lyophobic colloidal systems the colloidal particles begin to form larger aggregates and a sediment forms as they settle. This phenomenon is called flocculation, and the suspension can be referred to as flocculated, or colloidally unstable. If the salt is removed, the suspension can usually be restored to its original state; this process is called deflocculation or peptization. The original and restored colloidal systems are called deflocculated, peptized, or stable sols. Why does a small amount of salt have such a dramatic effect on the stability of a lyophobic colloidal system? The answer lies in an understanding of the attractive and repulsive forces that exist between colloidal particles. Van der Waals forces are responsible for the attractions, while the repulsive forces are due to the surface charge on the particles. In a stable colloid, the repulsive forces are of greater magnitude than the attractive forces. The magnitude of the electrical repulsion is diminished by addition of ionized salt, which allows the dispersed particles to aggregate and flocculate. River deltas provide an example of this behaviour. A delta is formed at the mouth of a river because the colloidal clay particles are flocculated when the freshwater mixes with the salt water of the oceanQ. When Van der Waals forces are greater than forces due to the surface charge on the particles,

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Which of the following is not correctly matched?a)Gelatain - Lyophilic colloidb)Gold sol - Lyophilic colloidc)Arsenious sulphide - Lyophobic colloidd)Ferric hydroxide - Lyophobic colloidCorrect answer is option 'B'. Can you explain this answer?
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Which of the following is not correctly matched?a)Gelatain - Lyophilic colloidb)Gold sol - Lyophilic colloidc)Arsenious sulphide - Lyophobic colloidd)Ferric hydroxide - Lyophobic colloidCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following is not correctly matched?a)Gelatain - Lyophilic colloidb)Gold sol - Lyophilic colloidc)Arsenious sulphide - Lyophobic colloidd)Ferric hydroxide - Lyophobic colloidCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not correctly matched?a)Gelatain - Lyophilic colloidb)Gold sol - Lyophilic colloidc)Arsenious sulphide - Lyophobic colloidd)Ferric hydroxide - Lyophobic colloidCorrect answer is option 'B'. Can you explain this answer?.
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