DP Chemistry (last assessment 2024)

Test builder »

Question 19M.1.hl.TZ2.5

Select a Test
Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1.hl.TZ2.5
Level hl Paper 1 Time zone TZ2
Command term Question number 5 Adapted from N/A
5.
[Maximum mark: 1]
19M.1.hl.TZ2.5

Which of the following transitions in the hydrogen atom emits the least energy?

A. n = 2 to n = 1

B. n = 3 to n = 1

C. n = 4 to n = 2

D. n = 4 to n = 3

[1]

Markscheme

D

Examiners report

81 % of the candidates identified the transition the emits the least energy in the given four transitions in the hydrogen atom (which was n=4 to n=3). The most commonly chosen distractor was A (n=2 to n=1) which means these candidates did not realize that the energy levels in the hydrogen atom converge at higher energy.

Syllabus sections