How do you differentiate between a gas and a vapour?

Cotton is solid, but it floats on water. Why?

Why are the particles in liquid held together less firmly as compared to solids?

Convert 273 K and 373 K into temperatures in Celsius scale. What is the physical state of water at these temperatures?

Name the state of matter in which the forces between the constituent particles are

(i) strongest

(ii) weakest