Arkansas State Barber Practice Exam

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Cocamide is one of the most widely used:

Nonionic surfactant
Anionic surfactant
Amphoteric surfactant
Cationic surfactant

The correct answer is: Nonionic surfactant

Cocamide is categorized as a nonionic surfactant because it does not carry a charge in its head group, unlike the other three options. This means that it is more versatile in its usage and can be combined with other types of surfactants without causing interactions. Anionic, amphoteric, and cationic surfactants all have charges in their head groups which can lead to compatibility issues. Therefore, this makes cocamide the most widely used surfactant in various industries such as cosmetics, pharmaceuticals, and cleaning products.