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Grade 12th pass9 grade science

6. Give two reasons to justify— (a) Water at room temperature is a liquid. (b) An iron almirah is a solid at room temperature.

Profile image of Harshit Singh
5 Years agoGrade 12th pass
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1 Answer

Profile image of Pawan Prajapati
5 Years ago
(a) (i) Intermolecular forces are less. (ii) Intermolecular spaces and kinetic energy is more. Thus, the molecules of water can interchange their spaces and hence water is in liquid state at room temperature. (b) (i) Intermolecular forces are very strong. (ii) Intermolecular spaces, as well as, kinetic energy are very small. Thus, the molecules are held very very tightly, with the result, the iron almirah has a definite shape and definite volume, and hence, is a solid.