lodine has greater heat of sublimation then its family members due to presence of stronger _.
Correct answer: B. London dispersion forces
- A. H-bonding
- B. London dispersion forces
- C. Dipole-dipole forces
- D. Chemical bonding
Explanation
Option B "LONDON DISPERSION FORCES " is the correct option. London dispersion forces are forces of attraction between nonpolar molecules which become polar for an instant . These forces are often found in halogens (e.g,F2 and I2), Noble gasses(e.g, Ne and Ar) and other nonpolar molecules. The polarizability of molecules increases with increase in atomic and molecular size , thus IODINE is easily polarizable and due to having strong dispersion forces the heat of sublimation is greater i.e, +62.42 kj/mole.
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Ionic crystals contain oppositely charged ions held by electrostatic forces, whereas molecular crystals contain discrete molecules joined by weaker intermolecular forces. Their structures explain differences in melting point, hardness, volatility, solubility and electrical conductivity, especially between solid and molten states.
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