Theory:

Chemistry is the branch of science that deals with the composition, properties, and structure of substances (elements and compounds), the change and how it changes and the energy relation with change (energy absorbed or released).
We can find chemistry in our daily life such as brushing our teeth, cooking food, eating breakfast, reading a newspaper, etc.
 
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Chemistry in our daily activities
 
Toothpaste:
The toothpaste is a mixture of many chemicals such as fluoride, sodium bicarbonate (baking soda), calcium carbonate, antibacterial agents, anti-tarter agents, etc.
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Brushing with toothpaste
  
Each of these chemicals has a specific property. For example, fluoride fights tooth decay.
Calcium carbonate helps remove plaque, sodium lauryl sulfate, produces foam while brushing our teeth. Also saccharin used as a (petroleum-based) sugar substitute.
 
The toothbrush is made up of plastic and nylon (bristles).
 
Soaps and Detergents:
Hydrophilic group (head) - Water loving
Hydrophobic group (tail) - Water hating
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Action of micelle
 
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Formation of micelle
 
The sodium or potassium salts with the fatty acids make up soaps and detergents used for cleaning purposes. The hydrophilic and hydrophobic groups in the soap molecules make action with the water molecules present and cleanse the dirt away.
  
Cooking:
  
The gas used for cooking to the reaction involved in cooking is related to chemistry.
 
For example, LPG, the cooking gas, is derived from the petroleum product; the changes that occur during cooking are chemical changes (an irreversible process).

We can also find chemicals in herbs, vegetables, fruits, and in all the ingredients we use for cooking food.
 
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Chemicals present in vegetables
Vitamin C (ascorbic acid and carbohydrates) is present in citrus fruits; onion contains Sulphur compounds.
While cutting an onion (syn- propanethial s-oxide), the chemical compound present containing sulphur released. It reacts with the moisture present in our eyes, producing sulfenic acid, irritating the eyes' nerves, making them tear up.
 
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Chemicals in our brain
 
From morning coffee (which contains caffeine, a chemical compound) to the human body 's biological clock all depends on the chemicals present in our brain.