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Test: Micelle Formation and CMC - Chemistry MCQ


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10 Questions MCQ Test Physical Chemistry - Test: Micelle Formation and CMC

Test: Micelle Formation and CMC for Chemistry 2024 is part of Physical Chemistry preparation. The Test: Micelle Formation and CMC questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Micelle Formation and CMC MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Micelle Formation and CMC below.
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Test: Micelle Formation and CMC - Question 1

What is the molecular formula of stearate ion?

Detailed Solution for Test: Micelle Formation and CMC - Question 1

Sodium stearate ionises to form stearate anion(C17H35COO) and sodium cation(Na+).

Test: Micelle Formation and CMC - Question 2

Which of the following is water insoluble?

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Test: Micelle Formation and CMC - Question 3

Select the incorrect statement from the following options.

Detailed Solution for Test: Micelle Formation and CMC - Question 3

In the micelle formation, the water insoluble tails are directed towards the centre, and the water soluble heads are on the surface in contact with water. All the other options are correct.

Test: Micelle Formation and CMC - Question 4

The transition of ions to micelle is ___________

Detailed Solution for Test: Micelle Formation and CMC - Question 4

The transition of ions to micelle is a reversible process. In the micelle formation, the water insoluble tails are directed towards the centre, and the water soluble heads are on the surface in contact with water.

Test: Micelle Formation and CMC - Question 5

Micelles behave as colloids only when?

Detailed Solution for Test: Micelle Formation and CMC - Question 5

Micelles behave as colloids only when its concentration is greater than CMC. The CMC is an important characteristic of a surfactant. Before reaching the CMC, the surface tension changes strongly with the concentration of the surfactant. After reaching the CMC, the surface tension remains relatively constant or changes with a lower slope.

Test: Micelle Formation and CMC - Question 6

Which part of the stearate ion is hydrophilic in nature?

Detailed Solution for Test: Micelle Formation and CMC - Question 6

The end of the hydrocarbon chain is having a polar group (head) which is hydrophilic in nature and represented by a hollow circle.

Test: Micelle Formation and CMC - Question 7

The number of stearate ions required to form a micelle of colloidal size is ___________

Detailed Solution for Test: Micelle Formation and CMC - Question 7

About 70 stearate ions aggregate to form a micelle of colloidal size.

Test: Micelle Formation and CMC - Question 8

Select the correct statement from the following options.

Detailed Solution for Test: Micelle Formation and CMC - Question 8

The soap micelle is stable due to the negative charge on its polar head. In the micelle formation, the water insoluble tails are directed towards the centre, and the water soluble heads are on the surface in contact with water.

Test: Micelle Formation and CMC - Question 9

What is Critical Micelle Concentration?

Detailed Solution for Test: Micelle Formation and CMC - Question 9

The minimum amount of concentration that is required for the formation of the micelle is termed as Critical Micelle Concentration (CMC). It is defined as the concentration of surfactants above which micelles form and all additional surfactants added to the system go to micelles.

Test: Micelle Formation and CMC - Question 10

The conductivity of micelles is ___________

Detailed Solution for Test: Micelle Formation and CMC - Question 10

The conductivity of micelles is higher than the colloidal solution. And hence they can conduct more electric charges through them.

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