Washing up solution not rinsed off satisfactorily is an example of a chemical hazard. Chemical hazard is a type of occupational hazard caused by exposure to chemicals in the place of work. This poses a wide range of health hazards such as irritation and sensitization.
Piece of jewellery found in some food is an example of physical hazard. A physical hazard is an agent in the environment that can cause harm with or without contact. It also includes things like noise and vibration.
Option B, C and D are not examples of physical or chemical hazards.
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