DP Chemistry (last assessment 2024)

Question 20N.1.hl.TZ0.9

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.1.hl.TZ0.9
Level	hl	Paper	1	Time zone	TZ0
Command term	Deduce	Question number	9	Adapted from	N/A

[Maximum mark: 1]

20N.1.hl.TZ0.9

Which of these species contains the shortest carbon to oxygen bond length?

A. ${CH}_{3} {CH}_{2} O^{-}$

B. ${CH}_{3} {CH}_{2} OH$

C. ${CH}_{3} {COO}^{-}$

D. ${CH}_{3} COOH$

[1]

Markscheme

Examiners report

More than 60% of the candidates identified the compound with the shortest C to O bond as ethanoic acid, with the most common incorrect answer being the ethanoate ion.

Syllabus sections

Core

Core » Topic 4: Chemical bonding and structure » 4.2 Covalent bonding

Core » Topic 4: Chemical bonding and structure

Question 20N.1.hl.TZ0.9

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