What is a Chemical Change?
A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed. It results when a substance combines with another to form a new substance (synthesis or either decomposes to form more substances). The oxidation reaction is a chemical change example that causes a chemical reaction.
They are generally irreversible except by further chemical reactions. Chemical change examples include chemical reaction which develops the dye in the colour and creates a chemical change in the hair. There are three types of chemical changes namely organic, inorganic and biochemical change.
Examples of Chemical Change in Everyday Life
Chemical changes happen around us all the time and not just in a chemistry lab. Some chemical change examples in our everyday life are mentioned below.
- Burning of paper and log of wood
- Digestion of food
- Boiling an egg
- Chemical battery usage
- Electroplating a metal
- Baking a cake
- Milk going sour
- Various metabolic reactions that take place in the cells
- Rotting of fruits
- Decomposition of waste
- The explosion of fireworks
- The reaction between salts and acids.
- Rusting of iron
- Lightening a matchstick
Chemical changes can be better understood by watching the video given below.
Chemical Changes Involving Organic Compounds
Organic Compounds are complex compounds of carbon in which one or more number of atoms are covalently linked to atoms of other elements. Some of the examples of chemical change involving organic compounds are stated below.
1. Burning of a Natural Gas
This is a clear example of a combustion reaction. Natural gas comprehends methane gas. When methane reacts with oxygen in the atmosphere it produces water and carbon dioxide. Hence it is an example of chemical change.
2. Ripening of Fruits
It involves a series of changes. Fruits consist of ethylene. There is an increase in ethylene production when fruit gets damaged or when it is plucked. This results in the production of new enzymes which in turn reacts with the chemical present on the fruit. So the fruit may witness several changes. Some changes are mentioned below.
- The fruit becomes more juicy and soft.
- Due to the breakdown of chlorophyll, the outer skin of fruit changes its colour.
- Tdiffersiffer, i.e it changes from sour to sweet.
- The aroma is emitted from ripe fruit.
Chemical Changes Involving Inorganic Compounds
The reactions of compounds and elements that do not involve carbon atoms are the chemical changes involving inorganic compounds. Some examples of chemical change that involves inorganic compounds are mentioned below.
1. Formation of Steel
It is an irreversible process. Steel is formed by the addition of several other elements in definite quantities to iron, the basic element being carbon. This results in the formation of new substances thus considering it has a chemical change. Properties of the newly formed substances are different from that of iron.
2. The lighting of a Firework
Firework consists of metal nitrates thus constituting to burning compounds. When firework is lit, combustion takes place leading to the formation of a new substance with the emission of light and heat. Thus it can be considered as a chemical change.
It deals with the chemistry of the activity and the growth of living organisms. An example of biochemical changes is mentioned below.
Photosynthesis is a process which is mainly used by plants to convert light energy into chemical energy. It is a chemical process that occurs in plants. In this process, plants convert water and carbon dioxide into sugars and oxygen.
1. Milk turns sour due to
(a) Conversion of lactose in lactic acid
(b) Increased chemical changes
(c) Conversion of lactic acid into lactose
(d) Both A and B
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