“Cooking of vegetables” is a chemical change.
Explanation: When vegetables are cooked, their chemical composition changes due to the breakdown of complex molecules within the cells, resulting in a change in texture and taste. This is a distinct chemical reaction compared to the other options which are physical changes.
Why other options are incorrect:
Twinkling of stars:
This is a physical phenomenon related to the light emitted by stars as it interacts with the Earth’s atmosphere, not a chemical change.
Cutting of fruits:
Cutting a fruit only changes its physical form, not its chemical composition. The cells remain intact, and the chemical reactions within the fruit continue.
Boiling of water:
Boiling water is a phase change from liquid to gas, but the water molecules themselves remain chemically unchanged. There is no new substance formed.