Question

Kraft temperature is the temperature-

• A. Above which the aqueous solution of detergents starts boiling.
• B. Below which the formation of micelles takes place.
• C. Above which the formation of micelles takes place.
• D. Below which the aqueous solution of detergents starts freezing.

Answer 1

The correct option is C

Above which the formation of micelles takes place.

The explanation for the correct option:

1. When present in low quantities, associated colloids behave like strong electrolytes as usual, but when present in higher concentrations, aggregate formation causes the substance to behave like a colloidal substance.
2. Micelles are the collectively generated particles in this process.

The explanation for the incorrect option: Only above a specific temperature known as the Kraft temperature (T), do micelles develop.

Hence, option C is the correct answer.