Question

please help me this is the chemistry homwrk​

Answer 1

Answer:

Physical change:

Physical properties of matter include its appearance and observable properties. Some physical properties are colour, odour, taste, solubility, rigidity, fluidity, melting and boiling points, etc.

Desirable change:

Desirable changes are the one which are brought about by nature and results produced by these changes are good results or useful results.

Exothermic change:

A chemical reaction which releases heat to the surroundings.

Explanation:

Hope this answer helps you.

Answer 2

⭐⭐PHYSICAL CHANGE Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. ...⭐⭐

⭐⭐⭐DESIRABLE CHANGE Desirable changes are the one which are brought about by nature and results produced by these changes are good results or useful results. Example: rain bringing water to the crops, milk changing into curd, ripening of seedlings of fruits into a plant.⭐⭐⭐