Question

10. Why is an iron rod solid at room temperature?
ich characteristic of a gas is used in supplying oxygen cylinders to hospitals?
• At what temperature, do solid ice and liquid water co-exist together?
19. Why does the level of water not change when sugar is dissolved in water?
20. How do three states of matter arise?
21. Why should wet clothes be spread while drying?
22. Why do liquids take up the shape of the container in which they are kept?
23. Name SI unit of measuring temperature. The boiling point of water is 100 °C under non
atmospheric pressure. Convert this temperature to SI units.
24.Name three states of matter. Which state of matter is rigid and why?
25. What is the name of the phenomenon of changing a liquid into its vapours at a temperat
below its boiling point?
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Answer 1

Answer: At 0 degree C solid ice and liquid water co exist together.

19 . When sugar is dissolved in water , the molecule of sugar gets into the spaces between the molecule of water . So the level not changes .

20 . The 3 states of matter arise due to the position of the molecule due the amount of heat present in them .

21 . Wet clothes should be spread while drying so that the water molecules move away with sir from a greater absorptive area .

22 . Liquids take the shape of container as the molecule are losely packed . They slide over each other .

23 .Si unit is degree Celsius

24 . Water , solid and Gas . Solid is most rigid as the molecule are tightly packed .

25 . Sublimation

Explanation: Hope it helps you . Pls mark as brainliest