give two examples of first order reaction

Two examples of first-order reactions are:

1. The decomposition of hydrogen peroxide (H₂O₂) into water (H₂O) and oxygen (O₂), which follows first-order kinetics:
   2H2O2→2H2O+O22H_2O_2\rightarrow 2H_2O+O_22H2​O2​→2H2​O+O2​

2. The hydrolysis of methyl acetate (CH₃COOCH₃) in the presence of mineral acids, where methyl acetate reacts with water to give acetic acid and methanol:
   CH3COOCH3+H2O→CH3COOH+CH3OHCH_3COOCH_3+H_2O\rightarrow CH_3COOH+CH_3OHCH3​COOCH3​+H2​O→CH3​COOH+CH3​OH

These reactions have rates proportional to the concentration of a single reactant, characteristic of first-order reactions.