DP Chemistry (last assessment 2024)

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Question 19M.1.hl.TZ2.6

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1.hl.TZ2.6
Level hl Paper 1 Time zone TZ2
Command term Question number 6 Adapted from N/A
6.
[Maximum mark: 1]
19M.1.hl.TZ2.6

How is colour produced in transition metal complexes?

A. Light is absorbed when electrons are promoted between split d-orbitals.

B. Light is emitted when electrons fall between split d-orbitals.

C. Light is absorbed when electrons escape from the complex.

D. Light is emitted when the complex returns to ground state.

[1]

Markscheme

A

Examiners report

69 % of the candidates understood how colour is produced in transition metal complexes. The most commonly chosen distractor was B, which also recognized the involvement of the split d-orbitals, however stated that colour is produced when light is emitted when electrons fall between split d-orbitals.

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