Chemical reaction in a house

Answer 1

physical-

cutting something

curling your hair

making steam

freezing something

Chemical-

burning a candle

toasting toast peroxide on a cut.

Answer 2

Chemical reactions in a house can include combustion of natural gas for heating, oxidation of metals leading to rust formation, and decomposition of organic matter producing odor-causing gases like methane and ammonia. These reactions can occur in appliances, building materials, and household waste, and may impact indoor air quality and safety.

Answer 3

a hydrogen in the air that is harmful to the lungs