The CORRECT order of melting points of group 15 trifluorides is · ABC26IN0716
Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Hard
The CORRECT order of melting points of group 15 trifluorides is
(a)$\mathrm{PF}_{3}<\mathrm{AsF}_{3}<\mathrm{SbF}_{3}<\mathrm{BiF}_{3}$
(b)$\mathrm{BiF}_{3}<\mathrm{SbF}_{3}<\mathrm{PF}_{3}<\mathrm{AsF}_{3}$
(c)$\mathrm{PF}_{3}<\mathrm{SbF}_{3}<\mathrm{AsF}_{3}<\mathrm{BiF}_{3}$
(d)$\mathrm{BiF}_{3}<\mathrm{AsF}_{3}<\mathrm{SbF}_{3}<\mathrm{PF}_{3}$
Answer
Answer: A ✓ checked by 4AB · confidence medium
Explanation
Melting points rise as the fluorides become more ionic: PF₃ < AsF₃ < SbF₃ < BiF₃ (a).
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