D. Differentiate between the following.
1. Physical and chemical changes
2. Periodic and non-periodic changes
Answers
Answer:
- In physical change, composition of substances remains same after. In chemical change, composition of substance changes. - Physical change is generally reversible chemical change is not. - Periodic change repeats after some specific time, non-periodic change don't.
Answer:chemical change:- A chemical change is the change of chemical composition matter .It is usually is reversible ,new products have form, change always involve absorption or release of energy.physical changes:- physical changes a change of matter that occurs without the change in the chemical composition of matter ,it is usually reversible ,new products are not form.Explanation:periodic change:- changes which repeat themselves are called periodic changes. Example day and night .non periodic change:- change with do not occur regularly interval of time is called non periodic change .Example earthquake .