Can someone please give me a summery of phisical and chemical changes???
(class 7- science - ch 6)...(any grade person can answer)
( I mainly want to know all the formulas )
Answers
Answer:
In our day to day life, we come across many changes such as rusting of iron, liting of a match, bread becoming toast, etc. All these changes are either a chemical change or a physical change.
Changes can be classified into two types viz physical change and chemical change.
Physical change is a change in which the molecular arrangements are rearranged and the chemical composition remains as it is. It is usually a reversible process. During a physical change, there is no formation of the new product. Physical properties such as size, color, shape, of the substances changes. Example, freezing of water.
A chemical change is a change in which the chemical composition of a substance is changed to transform into a new substance. It is usually an irreversible process. Whenever a chemical change occurs it forms a new product. Example, the setting of curd.
Answer:
physical change is type if reaction in which it can be reverse again and again for example forming of cloud
chemical change is which permanent change which can not be reverse again for example forming of cud