Final answer:
Option B is incorrect because Maria's analysis showed that mixture (e) remained green and colorless after combining, indicating a physical change and not a chemical change, as no new color was produced.
Step-by-step explanation:
The conclusion about chemical changes that is considered incorrect based on Maria's analysis of her results is option B) A chemical change occurred in mixture (d) because of a color change. However, according to the data provided, mixture (e) underwent a physical change rather than a chemical change as no color change or other evidence of a chemical change was observed when the green mixture and the colorless solution were combined, they remained green and colorless respectively. Common indicators of a chemical change include a change in color, production of a gas, formation of a precipitate, and energy changes such as temperature change or light production. Since options A, C, and D fit these indicators, they are likely correct conclusions while option B does not fit Maria's analysis correctly this making it the incorrect conclusion.