Question

Identify the correct order for the given property for following compounds. 

Choose the correct answer from the option given below :

• A. (A), (C) and (E) only
• B. (A), (B) and (E) only
• C. (A), (C) and (D) only
• D. (B), (C) and (D) only

Hint:

When analyzing boiling points and densities:
• Boiling points increase with molecular mass and stronger intermolecular forces.
• Densities increase with molecular mass and atomic size.
• For halogens, the trend is: Cl < Br < I for both properties.

Answer 1

The Correct Option is A

1. Analysis of Boiling Point: - Boiling point increases with molecular mass and inter-molecular forces.
- For halogenated compounds, larger halogens contribute to higher boiling points due to increased van der Waals forces. - The order (A) is correct as Cl−Cl < Cl−Cl < Cl−Cl−Cl.
2. Analysis of Density: - Density increases with molecular mass. - For halogenated compounds, the density follows the order I−I > Br−Br > Cl−Cl.
- Option (B) is incorrect, as it contradicts the trend.
3. Analysis of Boiling Point (C): - A compound with multiple bromine atoms has a higher boiling point due to stronger van der Waals forces. - The order in (C) is correct: Br−Br < Br−Br−Br−Br−Br−Br−Br.
4. Analysis of Density (D): - The density order is Cl−Cl < Br−Br < I−I. - Option (D) is consistent with the general trend.