what is chemical and physical change
Answers
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.
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ᴄʜᴇᴍɪᴄᴀʟ ᴄʜᴀɴɢᴇ :-- 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.
ᴩʜyꜱɪᴄᴀʟ ᴄʜᴀɴɢᴇ :-- A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. Physical changes can further be classified as reversible or irreversible. The melted ice cube may be refrozen, so melting is a reversible physical change.