Find worked solutions for different exam papers, ask questions and connect with
medical aspirants and students from all over the world.

Home Forums BMAT Exam BMAT – Problem Solving and Discussion BMAT 2020 Section 2 Q22

Sort by:
  • BMAT 2020 Section 2 Q22

  • Nicolas Sanchez

    June 26, 2021 at 8:44 am
    1023 Replies
    201950 XP
    Contributions: EnterMedSchool Donor Team Manager Volunteer
    Reputation: Level 7

    The compounds BrCl and BrI melt at –66 °C and 42 °C, respectively.
    What is the best explanation for this difference in melting points?

    A. The Br−I covalent bond is stronger than the Br−Cl covalent bond.
    B. Chlorine is more reactive than iodine so chlorine breaks away from bromine more readily than iodine.
    C. The forces between BrI molecules are stronger than the forces between BrCl molecules.
    D. Iodide ions are larger than chloride ions so bromide ions form stronger ionic bonds with iodide ions than with chloride ions.
    E. Iodine atoms are larger than chlorine atoms so the BrI giant covalent lattice is more difficult to break up than the BrCl giant covalent lattice.

  • Paris Pitsinikos

    July 21, 2021 at 6:40 pm
    331 Replies
    137970 XP
    Contributions: Team Manager EnterMedSchool Donor Volunteer
    Reputation: Level 6
    Down Accepted answer

    The boiling point is affected by the intermolecular forces. The BrI has stronger Dispersion forces since the iodine atom has a larger electronic cloud since it has more electrons.

    The answer is C.

Viewing 1 - 2 of 2 replies

Original Post
0 of 0 posts June 2018