grapefruit and orange can be distinguished by smell, skin and pulp color.

1. Smell

1. The skin of grapefruit is slightly fragrant.

2. The orange peel contains aromatic smell, which has a strong taste.

2. Skin

1. The skin of grapefruit is relatively smooth and shiny.

2. The orange skin is relatively rough with even pits.

3. pulp color

1. The pulp of grapefruit is mostly red or reddish white.

2. The pulp of oranges is mostly yellowish white.