Past paper · 2022

NSEC 2022 paper, answer key & practice

60 questions · 120 minutes · 216 marks. Official resources with paper-specific notes and a clear review route.

Exam dateQuestionsTimeMaximum marks
27 November 202260120 minutes216
The official paper is a scan. Its original diagrams and pages are preserved in the PDF; use a large enough display or a printout to inspect structures.

Final answers · Code 31

Match this code to your question paper. For Questions 49–60, choose the complete listed set; a single listed option is possible even in the multiple-correct section.

QuestionAnswerQuestionAnswerQuestionAnswer
1D21C41D
2C22C42B
3B23B43A
4D24A44B
5C25A45C
6C26C46C
7A27C47C
8B28D48D
9D29D49B, D
10B30D50A, C
11B31C51A, C
12C32A52B, D
13C33C53A, C, D
14D34A54A, C
15A35C55C, D
16A36D56A
17C37C57A, B, C
18D38B58A, B, C
19B39A59A, C
20D40D60B, C, D

What is included here?

This page provides the official paper and final answer key. A complete worked-solution set for this year is not included. For step-by-step learning now, use the explained original questions and the 2025 worked examples.

Make the review count

For each missed problem, write the governing chemical idea before repeating the calculation. Check units, charges, reaction stoichiometry and which assumptions the question permits. In multiple-correct questions, justify every option independently.

Keep a short error log: question number, cause of error, corrected reasoning and a date to try it again. A solved paper becomes useful when you can reproduce the reasoning later.

Sources & verification

Exam information checked 20 October 2026. Subsequent official notices take precedence.