Why is orange juice a mechanical mixture?

Orange juice is not a mechanical mixture. It is a homogeneous mixture, also known as a solution. A mechanical mixture is a heterogeneous mixture, meaning it is composed of two or more substances that are not chemically combined and are easily separated by physical means, such as filtration or sieving. Orange juice, on the other hand, is a homogeneous mixture because the components, such as water, sugars, and citric acid, are evenly distributed and cannot be separated by simple physical means.