DP Chemistry (last assessment 2024)

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Question 19M.1.sl.TZ1.9

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1.sl.TZ1.9
Level sl Paper 1 Time zone TZ1
Command term Question number 9 Adapted from N/A
9.
[Maximum mark: 1]
19M.1.sl.TZ1.9

What is the order of increasing boiling point?

A. CH3CH2CH2CH3 < CH3CH(OH)CH3 < CH3COCH3 < CH3CO2H

B. CH3CH2CH2CH3 < CH3COCH3 < CH3CH(OH)CH3 < CH3CO2H

C. CH3CO2H < CH3COCH3 < CH3CH(OH)CH3 < CH3CH2CH2CH3

D. CH3CH2CH2CH3 < CH3COCH3 < CH3CO2H < CH3CH(OH)CH3

[1]

Markscheme

B

Examiners report

Ranking compounds in order of increasing boiling point proved challenging. There existed a number of misconceptions based on the incorrect answers chosen being close to evenly distributed.

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