Question

when different substances are mixed together it can result in a physical or chemical change explain with the help of an example​

Answer 1

Answer:

When a candle burns, both physical and chemical changes occur.

Physical Changes: On heating, candle wax gets melted. Since it again turns into solid wax on cooling. So, the melting of wax and vapourisation of melted wax are physical changes.

Chemical Changes : The wax near flame burns and gives new substances like carbon dioxide, carbon soot, water vapour, heat and light.

LPG is another example of a familiar process in which both the chemical and physical changes take place. LPG is present in liquid form in the cylinder. When it comes out of the cylinder, it converts into gaseous form which is a physical change. It undergoes chemical change when gas burns in air.