Which ion's result is described as cream or pale yellow in group 7 ion tests?

The description of the result as cream or pale yellow in group 7 ion tests corresponds to the bromide ion. When bromide ions are subjected to tests for halides, such as a reaction with silver nitrate, a cream precipitate of silver bromide is formed. The pale yellow hue of the precipitate can sometimes lead to some variations in perception under different lighting conditions, but it is commonly recognized as cream in color.

In contrast, the other halides behave differently in similar tests. Chloride would produce a white precipitate of silver chloride, iodide would yield a yellow precipitate of silver iodide, and fluoride typically does not yield a precipitate with silver ion but may react differently leading to soluble products. The specific colors and behaviors of these ions in tests help to distinguish between them, making the identification of bromide ions based on the cream or pale yellow result quite clear.