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BiologyCLASS 9CBSE
answered 12 May 2026

Consider the three states of water: ice, liquid water, and steam. Arrange them in increasing order of (a) kinetic energy of particles and (b) intermolecular forces of attraction.

A.VERIFIED ANSWERfact-checked by tutors

(a) Increasing order of kinetic energy of particles: Ice < Liquid water < Steam. Justification: Kinetic energy is directly related to temperature and the freedom of particle movement. Particles in steam (gas) have the highest kinetic energy and move most freely, followed by liquid water, and then ice (solid) where particles only vibrate. 

(b) Increasing order of intermolecular forces of attraction: Steam < Liquid water < Ice. Justification: Stronger intermolecular forces hold particles closer together. In ice (solid), forces are strongest, followed by liquid water, and then steam (gas) where forces are weakest and negligible.

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BIOLOGY · CLASS 9