Which substance dissolves in water but has no scent?

Gum is a polysaccharide substance that readily dissolves in water, forming a thick, viscous solution. This property is primarily due to its soluble fiber content, which allows it to absorb water and swell, creating a gel-like consistency. Unlike essential oils and volatile oils, which are derived from plants and possess distinct aromatic characteristics, gum does not have a strong scent. This makes it unique among the substances listed, as both essential oils and volatile oils are known for their fragrance, which is significant in culinary and therapeutic contexts. Resin also typically has a distinct smell and is less soluble in water. Thus, gum stands out as the substance that dissolves in water without imparting a scent.