DP Chemistry (last assessment 2024)

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Question 22M.1.hl.TZ2.27

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.hl.TZ2.27
Level hl Paper 1 Time zone TZ2
Command term Apply Question number 27 Adapted from N/A
27.
[Maximum mark: 1]
22M.1.hl.TZ2.27

Which species are both Lewis and Brønsted–Lowry bases?

I.   CN−
II.  OH−
III. NH3


A.  I and II only

B.  I and III only

C.  II and III only

D.  I, II and III

[1]

Markscheme

D

Examiners report

45% of candidates chose all three species as Lewis and Brønsted-Lowry bases. The most commonly chosen distractor excluded CN-.

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