give two example 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 aspirin, where the reaction rate depends linearly on the concentration of aspirin.

These examples demonstrate that in first-order reactions, the reaction rate is directly proportional to the concentration of a single reactant. As the reactant concentration decreases, the reaction rate slows down correspondingly.