When an acid reacts with a metal like zinc, it produces Hydrogen gas . You can test for this gas with a "burning splint" test—it will make a distinct 'pop' sound .
It forms when gases from factories and cars mix with water in the atmosphere. new mastering science workbook 2b answer chapter 9
Science examiners look for specific terminology. Instead of saying "the air got dirty," use "the concentration of air pollutants increased." When an acid reacts with a metal like