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Adding surfactants in non polar solvent,...

Adding surfactants in non polar solvent,the micelles structure will look like (Surfactant structure) head tatal head tail

A

d

B

c

C

b

D

a

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D
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Endoskeletal structure present in the head is

Which of the following structure of adapter molecule looks like a clover leaf?

Knowledge Check

  • Endoskeletal structure present in the head is

    A
    Apodeme
    B
    Tentorium
    C
    Fenestra
    D
    Clypeus

  • In macromolecular type of colloids, the dispersed particles are themselves large molecules (usually polymers). Since these molecules have dimensions comparable to those of colloidal particles, their dispersions are called macromolecular colloids. Most lyophilic sols belong to this category. These are certain colloids which behave as normal strong electrolytes at low concentrations, but exhibit colloidal properties at higher concentrations due to the formation of aggregated particles. These are known as micelles or associated colloids. Surface active agents like soaps and synthetic detergents belong to this class. Critical micelle concentration (CMC) is the lowest concentration at which micelle formation appears. CMC increases with the total surfactant concentration. At concentration higher than CMC, they form extended parallel sheets known as lamellar micelles which resemble biological membranes. With two molecules thick, the individual molecule is perpendicular to the sheets such that hydrophilic groups are on the outside in aqueous solution and on the inside is a non-polar medium. In concentrated solution, micelles take the form of long cylinders packed in hexagonal arrays and are called lytotroic measomorphs. In an aqueous solution (polar medium), the polar group points towards the periphery and the hydrophobic hydrocarbon chains point towards the conforming the core of the micelle. Mecelles from the ionic surfactants can be formed only above a certain temperature called the Kraft temperature. They are capable of forming ions Molecules of soaps and detergents consist of lyophilic as well as lyophilic parts which associate together to form micelles. Micelles may contain as many as 100 molecules or more. Surfactant molecules can cluster together as micelles, which are colloid sized cluster of molecules. Micelles form only above critical micelle concentration (CMC) and above certain temperature called kraft temperature. Which is false about micelle formation ?

    A
    `DeltaS` of micelle formation is positive
    B
    the hydrophobic part lie towards interior of micelle in water
    C
    the hydrophilic part lie towards surface or micelle in water
    D
    `DeltaS` of micelle formation is negative

  • Which of the following structure of adapter molecule looks like a clover leaf?

    A
    Secondary
    B
    Tertiary
    C
    Primary
    D
    Quaternary
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