Question

give three examples of chemical change. explain whether each change is slow or fast, reversible or Irreversible and man made or natural. ​

Answer 1

Answer:

All changes in the world are one of the two types – Reversible changes and irreversible changes. A change which can happen backward, that is, can be reversed is called a reversible change. If you keep water in the freezer for some time, it transforms into ice. But as soon as you take it out of the freezer, it turns into water again. This is a reversible change. Similarly, if you boil water, it evaporates and becomes water vapor. When you cool this vapor down, it turns back to water.

Answer 2

Explanation:

chemical change: milk .curd. chocolate

milk :fast irreversible man made