Question

How is colour change are identified?
2)How is formation of a precipitate are identified?
3)How is formation of a bubble are identified?
4)How is formation of a gas are identified?
5)How is change in smell are identified



PLEASE ANSWER THIS ABOVE QUESTIONS……​

Answer 1

Explanation:

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition. Although we call them physical "reactions," no reaction is actually occurring. In order for a reaction to take place, there must be a change in the elemental composition of the substance in question. Thus, we shall simply refer to physical "reactions" as physical changes from now on

Answer 2

Answer:

ur answer is in the attachment