DP Chemistry (last assessment 2024)

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Question 21N.2.sl.TZ0.3b(ii)

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Date November 2021 Marks available [Maximum mark: 1] Reference code 21N.2.sl.TZ0.3b(ii)
Level sl Paper 2 Time zone TZ0
Command term Explain Question number b(ii) Adapted from N/A
b(ii).
[Maximum mark: 1]
21N.2.sl.TZ0.3b(ii)

White phosphorus is an allotrope of phosphorus and exists as P4.

(b(ii))

Explain the polarity of PCl3.

[1]

Markscheme

polar AND unsymmetrical distribution of charge
OR
polar AND dipoles do not cancel
OR
«polar as» dipoles «add to» give a «partial» positive «charge» at P and a «partial» negative «charge» at the opposite/Cl side of the molecule ✔

Accept “polar AND unsymmetrical molecule”.

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