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Kraft temperature is the temperature -

1. Below which the formation of micelles takes place
2. Below which the aqueous solution of detergents starts freezing
3. Above which the aqueous solution of detergents starts boiling
4. Above which the formation of micelles takes place

Correct answer: Above which the formation of micelles takes place

Solution

Kraft temperature is the threshold above which surfactants, such as detergents, can effectively form micelles, which are essential for their cleaning action. Below this temperature, micelle formation is limited, reducing the effectiveness of the detergent.

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