DP Chemistry (first assessment 2025)

Test builder »

Question 21N.2.SL.TZ0.b(ii)

Select a Test
Date November 2021 Marks available [Maximum mark: 3] Reference code 21N.2.SL.TZ0.b(ii)
Level SL Paper 2 Time zone TZ0
Command term Outline Question number b(ii) Adapted from N/A
b(ii).
[Maximum mark: 3]
21N.2.SL.TZ0.b(ii)

Outline the reason why PCl5 is a non-polar molecule, while PCl4F is polar.

[3]

Markscheme

PCl5 is non-polar:

symmetrical
OR
dipoles cancel ✔

 

PCl4F is polar:

P–Cl has a different bond polarity than P–F ✔

non-symmetrical «dipoles»
OR
dipoles do not cancel ✔


Accept F more electronegative than/different electronegativity to Cl for M2.

Syllabus sections