Question

give two examples of changes that occur due to mixing of substances

Answer 1

1)glucose (present in the cell) {in the absence of air / oxygen gives} ethyl alcohol + carbon dioxide + energy or C6 h12 o6 absence of oxygen gives C2 h5 o h + Co2 (g) + energy
2) glucose (in muscle){absence of oxygen} lactic acid + energy or C6H12O6 {Absence of oxygen} CH3-CHOH-COOH+ENERGY