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About this exam

NEB Class 12 Chemistry (कक्षा १२ रसायन विज्ञान) is the chemistry paper within the Grade 12 examinations conducted by the National Examinations Board (NEB), Sanothimi, Bhaktapur, under the Government of Nepal. It is taken by Grade 12 science-stream students who need the subject for their School Leaving Certificate profile and for university admission in science, health, engineering and related fields. The board publishes a Grade 12 Assessment Framework and downloadable sample question papers (नमुना प्रश्नपत्रहरू), and it publishes separate annual and supplementary (मौका/पूरक) examination timetables. The official notice list shows Chemistry treated as a full subject for result processing: there are published re-totaling result notices for Grade 12 Chemistry specifically, and Chemistry appears alongside Physics, Biology and Computer Science in a combined re-totaling notice. This page is an independent study resource and is not affiliated with or endorsed by NEB. The board's own site does not, in the retrieved text, state the item count, duration, passing score or fee for the Chemistry paper, so treat any such figure you see elsewhere as unverified and confirm it against the current official timetable, assessment framework and sample paper before relying on it. Prepare by working through the official syllabus and sample papers under timed conditions, then drilling numerical and mechanism-based topics where errors are costliest.

What you'll study

Common questions

About NEB Class 12 Chemistry preparation

Who conducts the Class 12 Chemistry exam and where is the board based?

It is conducted by the National Examinations Board (NEB), Sanothimi, Bhaktapur, under the Government of Nepal. The board's site lists examination-related contact numbers for Grade 12 and a general email address, [email protected]. Always confirm details on the official site rather than third-party pages.

How long is the Chemistry paper and how many marks is it?

The retrieved official page does not state the duration, item count, marks or passing score for Grade 12 Chemistry. Those details sit in the board's Assessment Framework for Grade 12 and the examination timetable, which the site lists but does not reproduce in text. Check the current versions of both before you plan your timing.

Does Chemistry have a separate re-totaling process from other subjects?

The board publishes re-totaling result notices both for Grade 12 Chemistry alone and in a combined notice covering Physics, Biology, Chemistry and Computer Science. That means Chemistry results can be re-totaled through the board's own application process. Follow the current re-totaling application notice for deadlines and procedure rather than older notices.

What happens if I fail or miss the regular Chemistry paper?

The board publishes a separate Grade 12 supplementary (मौका/पूरक) examination timetable and application form notice, and it publishes supplementary results and supplementary re-totaling results. The retrieved text does not state the conditions or limits for sitting the supplementary exam, so read the current supplementary notice carefully for eligibility and deadlines.

Where can I find official sample question papers for Chemistry?

The board's site has a downloadable sample question papers section (नमुना प्रश्नपत्रहरू) and a separate question-construction handbook for Science and Technology. Use these as your primary format reference. This page does not reproduce them and cannot confirm their contents, so download the current files directly from the board.

How difficult is the paper and how should I order my study?

Difficulty varies by cohort and the board does not publish difficulty statistics in the retrieved text. A practical order is: finish physical-chemistry numericals first because they are trainable and high-yield, then inorganic descriptive blocks, then organic reasoning and named reactions, finishing with timed full-paper practice using the official sample papers.

What are the most common ways candidates lose marks?

Typical losses come from skipping units and significant figures in numericals, writing unbalanced equations, and giving vague inorganic answers without conditions or observations. Organic answers lose marks when reagents and reaction conditions are omitted. Practise writing full, self-contained answers under time pressure rather than only reading solutions.

Are mobile phones allowed in the exam hall?

The board has published a notice prohibiting mobile phones and other electronic devices in the examination hall. Treat this as a strict rule and leave devices behind. The retrieved text does not list penalties, so read the notice itself for the exact wording and consequences.

How do I check my Chemistry result?

The board's site has a results section and lists a Grade 12 results entry for 2083. Results, re-totaling outcomes and rechecking outcomes are published as separate notices. Use only the board's own result service, and note that this independent page cannot retrieve or verify individual results.

Is this page officially connected to NEB?

No. This is an independent study resource written for candidates searching for the exam. It is not affiliated with, endorsed by, or acting on behalf of the National Examinations Board. Every administrative fact should be confirmed against the board's official website and current notices.