Is mayonnaise a lyophobic and why?

Yes, mayonnaise can be considered lyophobic because it is an emulsion consisting of oil and water, where the oil (hydrophobic) does not mix with water (hydrophilic). In mayonnaise, the emulsifier, typically egg yolk, stabilizes the mixture by allowing the oil droplets to disperse in water, preventing separation. However, the inherent nature of oil to repel water classifies mayonnaise as lyophobic, as it requires energy (in the form of emulsification) to maintain its stable state.