Which is incorrect about structure of iodine:
Correct answer: C. 1-1 (g) > 1 - 1 (s) Bond lenght
- A. Face-centered cubic
- B. Metallic appearance
- C. 1-1 (g) > 1 - 1 (s) Bond lenght
- D. 1-1 (g) < 1 - 1 (s) Bond lenght
Explanation
1-1 bond distance is 271.5 pm and it is appreciably longer than in gaseous iodine (266.6pm).Option C suggests that the bond length between iodine atoms in the gaseous state is greater than the bond length in the solid state. This is incorrect. The bond length in the solid state is greater due to intermolecular forces and lattice structures, which cause the iodine molecules to be spaced farther apart.
Last updated
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.
Practise Solids
357 free Solids MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A solid melts sharply just above 100 degree centigrade. It does not conduct electricity even when molten. It has weak Vander waal's forces. What is the structure of the solid most likely to be?
All3 (Aluminium Iodide) is electrically a _
Among halogens, iodine is solid at room temperature while Br2 is liquid and CI and F are gases at room temperature, why?
An example of a non-polar molecular crystal is _.
Boiling Points of Polar Molecular solids are