Evidence of chemical reactions include - light production, color change (new/different), gas production (bubbles/fizzing - not boiling), precipitate, and temperature change

no light production, color change (new/different), gas production (bubbles/fizzing - not boiling), precipitate, and temperature stays the same

color change (new/different), gas production (like when a soda is opened), precipitate, and temperature stays the same

light production, color change (like adding food coloring to water), gas production (like when a soda is opened), precipitate, and temperature change