Question

Which of the following are changed when water boils?
(i) Temperature (ii) State (iii) Colour

Only (i) and (ii) Only (ii) and (iii) Only (i) and (iii) (i), (ii) and (iii)

Answer 1

Answer:

only I) and ii) ,...................

Answer 2

When water boils, the following are changed - Only (i) and (ii) Only

(i) Temperature

As the water boils, its temperature increases. Liquid water is below 100 °C. At 100 °C, the water starts boiling.

Thus, the temperature of the water is raised when it starts boiling.

(ii) State

Water is in a liquid state at room temperature. As the water reaches boiling point, it starts to convert into water vapour. Water vapour is the gaseous state of water.

Thus, the state of water is changed from liquid to gas.

(iii) Colour

Water is colourless in the liquid state and also in the gaseous state.

Thus, no change in colour will be observed when water boils.