DP Chemistry (last assessment 2024)

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Question 22N.2.sl.TZ0.1f.iv

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Date November 2022 Marks available [Maximum mark: 2] Reference code 22N.2.sl.TZ0.1f.iv
Level sl Paper 2 Time zone TZ0
Command term Deduce Question number f.iv Adapted from N/A
f.iv.
[Maximum mark: 2]
22N.2.sl.TZ0.1f.iv

Ammonium nitrate, NH4NO3, is used as a high nitrogen fertilizer.

Solid ammonium nitrate can decompose to gaseous dinitrogen monoxide and liquid water.

(f.iv)

Deduce the Lewis (electron dot) structure and shape for dinitrogen monoxide showing nitrogen as the central atom.

 

[2]

Markscheme

Lewis structure:

 ✔


Shape: linear ✔

 

Accept

OR

.

Only award M2 if the shape corresponds to that expected for the Lewis structure given.

Examiners report

Only a small proportion of candidates were able to deduce the Lewis structure of dinitrogen monoxide. Some candidates achieved the mark for the shape as error carried forward. A quarter of the candidates did not attempt this question.

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