Question

what is chemical change and phisycal change?​

Answer 1

Answer:

chemical change☟

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. 

Physical change☟

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds. 

Answer 2

Answer:

chemical change is a change where the substance change chemically . simply we can say that after chemical change it will totally change eg:- formula of oxygen when it is alone it will o2 but when hydrogen and water mix it will become water that is h2o and chemical change is irreversible

physical change is a change where the substance change physically but not chemically there will be no change in its chemical formula eg : a solid ice changes into liquid here, we can there is a change but only in its physic and it is somehow reversible