The change in state of water to ice is an example of ___________.
(a) What is meant by a chemical reaction ? Explain with the help of an example.
(b) Give one example each of a chemical reaction characterised by : (i) evolution of a gas
(ii) change in colour
(iii) formation of a precipitate
(iv) change in temperature
(v) change in state.
6. When ice melts to form water, then a change occurs in its state.
The changing of ice into water is an example of a-