NCERT class 9th science chapter 1 question 5
Answers
Answer:
the chapter is Matter in our surroundings
i think the question is : what is the physical state of water -
The answer is
Explanation:
(a) 25 º C
(a) 25 º C • Water at 25°C is present in the liquid state.
• The water which we use for our day-to-day activities is in a liquid state.
•The water we use for drinking, cooking, washing, etc., all are in a liquid state.
The water we use for drinking, cooking, washing, etc., all are in a liquid state.(b) 0ºC
• At 0°C, water exists in solid-state.
•We know that the freezing point of water is 0°C.
•The liquid form of water starts to become solid (ice) at this temperature.
~Example: If you keep an ice cube tray filled with water and freeze it for a few hours, you may observe the cubes where you poured water have become solid. Ice is the solid state of water.
Example: If you keep an ice cube tray filled with water and freeze it for a few hours, you may observe the cubes where you poured water have become solid. Ice is the solid state of water.(c) At 100ºC
• At 100°C, water exists in a gaseous state.
•We know that the boiling point of water is 100°C.
•The water starts to evaporate after attaining this high temperature.
~Example: When you boil water in your home, you observe the vapours coming out of the vessel after some time. These vapours are the gaseous state of water.
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