Which is incorrect about structure of iodine?
Correct answer: C. 1-1 (g) > 1-1 (s) Bond length
- A. Face-centered cubic
- B. Metallic appearance
- C. 1-1 (g) > 1-1 (s) Bond length
- D. 1-1 (g) < 1-1 (s) Bond length
Explanation
In solid iodine, the molecules are closer together due to the packing in the crystal lattice, resulting in a longer bond length compared to gaseous iodine. Therefore, the bond length of solid iodine is indeed greater than that of gaseous iodine. Therefore, option c is correct.
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About Ionic and Molecular Crystals
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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