Question

1. Liquids generally have lower density as compared to solids. But you must have
observed that ice floats on water. Why?
2. What is the physical state of water at 250°C, 100°C.0°C?
3. Give reasons: i) A sponge can be pressed easily, still it is called a solid in) Water
vapours have more energy than water at same temperature,
4. Is it possible to liquify atmospheric gases? If yes, suggest a method.
5 Read about at least five Indian Scientists and their contribution in chemistry and write
at least 50 words on each scientist,​

Answer 1

Answer:

4. Is it possible to liquify atmospheric gases? If yes, suggest a method.

5 Read about at least five Indian Scientists and their contribution in chemistry and write

at least 50 words on each scientist,