The occurrence of any of the following is not a sign of a chemical reaction:

The answer is: the buoyancy of the body

The occurrence of any of the following is not a sign of a chemical reaction: buoyancy, change in taste, odor, or brittleness. All of these may be evidence of other types of reactions or changes, however, they do not indicate a chemical reaction. For example, the buoyancy of an object may indicate a physical reaction due to changes in the density of the object, while the appearance of an odor or change in taste could be the result of microbial activity. In addition, friable materials often indicate physical changes due to changes in grain size or crystal structure.

The occurrence of any of the following is not a sign of a chemical reaction: body floating, color change, odor, and milk tasting bitter. All of these could be signs of physical changes, but none of them indicate a chemical reaction. A chemical reaction is usually indicated by the release of gases, a change in temperature, or a change in the amount or type of energy released or absorbed.

The occurrence of any of the following is not a sign of a chemical reaction: buoyancy of the object, change in smell, delamination, or appearance of gas. The buoyancy of an object is not an indication of a chemical reaction, as this is a physical phenomenon. A change in smell may indicate a reaction, but this is not always the case. Gloss removal may indicate an oxidation reaction, which is a type of chemical reaction. Finally, the appearance of gas may indicate that a reaction has occurred, but this is not always the case.