Question

Justifications
(5 marks)
2. Take small but equal amounts of water and milk in two different but similar
containers Freeze them by putting in a refrigerator. Now melt them in the sunshine
boil them on the same stove under the same conditions, and evaporate them
completely. Note their temperature and time during changing of their states. What
similarities and differences you find while changing the states of both of the
materials. Support your investigation results with time and temperature graph.
(5 marks)​

Answer 1

Experimenting the equal amounts of milk and water

Explanation:

Taking small but equal amounts of water and milk in the different but similar containers Firstly freezing them the water will take more time than milk to freeze. After freezing, melting them in sunshine  When milk is heated further, the "water vapour" of it gets expanded, pressure is being build and lifts the creamy layer of it up and thus the milk spills out from it. But in the case of water, the water vapour comes out very easily on boiling since it does not have any layer like the milk on the surface for the interruption till the complete evaporation of the liquid.