Central Board of Secondary Education
Practice Question Paper — not an official CBSE document
Subject Code 043 · Set 1 of 3
Theory 70 + practical 30. This page is the 70-mark theory practice paper.
Practice questions aligned to NCERT topics used in CBSE classrooms. These are original exam-oriented questions for revision — not official CBSE board papers and not a guarantee of any exam question. Always match the textbook issued by your school and the latest PDFs on ncert.nic.in and cbseacademic.nic.in.
Objective type (MCQ and Assertion–Reason) · Q1–16 · 1 mark each · 16 marks
B. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions
NoteRead the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions. The other options mix ideas from nearby topics or reverse the textbook fact.
C. If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures
NoteIf the chapter has a diagram, practise labelling it — many school tests ask for labelled figures. The other options mix ideas from nearby topics or reverse the textbook fact.
D. Mix MCQs with short answers so you remember both facts and explanations from Alcohols, Phenols and Ethers
NoteMix MCQs with short answers so you remember both facts and explanations from Alcohols, Phenols and Ethers. The other options mix ideas from nearby topics or reverse the textbook fact.
A. Λm and κ
NoteΛm and κ. The other options mix ideas from nearby topics or reverse the textbook fact.
A. Alcohols, Phenols and Ethers is an NCERT chapter taught in CBSE Class 12 Chemistry
NoteAlcohols, Phenols and Ethers is an NCERT chapter taught in CBSE Class 12 Chemistry. The other options mix ideas from nearby topics or reverse the textbook fact.
A. CBSE often tests a concept by asking a daily-life example from the same chapter
NoteCBSE often tests a concept by asking a daily-life example from the same chapter. The other options mix ideas from nearby topics or reverse the textbook fact.
B. Use the terms used in the NCERT book; do not replace them with unofficial names
NoteUse the terms used in the NCERT book; do not replace them with unofficial names. The other options mix ideas from nearby topics or reverse the textbook fact.
C. Nernst equation
NoteNernst equation. The other options mix ideas from nearby topics or reverse the textbook fact.
A. Methanol and ethanol uses
NoteMethanol and ethanol uses. The other options mix ideas from nearby topics or reverse the textbook fact.
C. Every chapter ends with keywords or a summary that is useful for one-mark answers
NoteEvery chapter ends with keywords or a summary that is useful for one-mark answers. The other options mix ideas from nearby topics or reverse the textbook fact.
B. Write three points from Alcohols, Phenols and Ethers in your own words; that is enough for a short-answer start
NoteWrite three points from Alcohols, Phenols and Ethers in your own words; that is enough for a short-answer start. The other options mix ideas from nearby topics or reverse the textbook fact.
D. Daniel cell
NoteDaniel cell. The other options mix ideas from nearby topics or reverse the textbook fact.
A. Both A and R are true, and R is the correct explanation of A.
NoteRead Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
A. Both A and R are true, and R is the correct explanation of A.
NoteRead Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
A. Both A and R are true, and R is the correct explanation of A.
NoteRead Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
A. Both A and R are true, and R is the correct explanation of A.
NoteRead Assertion and Reason separately first. Here both match the textbook idea, and R explains why A is taught in this chapter.
Very Short Answer · Q17–21 · 2 marks each · 10 marks
1. Kolbe, Reimer–Tiemann as in NCERT.
2. Keep the NCERT wording and add one daily-life example from the same chapter.
Two-mark answers work best as two numbered points. One definition plus one example is usually enough.
1. Electrochemistry is an NCERT chapter taught in CBSE Class 12 Chemistry.
2. Keep the NCERT wording and add one daily-life example from the same chapter.
Two-mark answers work best as two numbered points. One definition plus one example is usually enough.
1. CBSE often tests a concept by asking a daily-life example from the same chapter.
2. Keep the NCERT wording and add one daily-life example from the same chapter.
Two-mark answers work best as two numbered points. One definition plus one example is usually enough.
1. Use the terms used in the NCERT book; do not replace them with unofficial names.
2. Keep the NCERT wording and add one daily-life example from the same chapter.
Two-mark answers work best as two numbered points. One definition plus one example is usually enough.
1. Lucas test.
2. Keep the NCERT wording and add one daily-life example from the same chapter.
Two-mark answers work best as two numbered points. One definition plus one example is usually enough.
Short Answer · Q22–28 · 3 marks each · 21 marks
Batteries and fuel cells as in chapter. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
NoteThree-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Every chapter ends with keywords or a summary that is useful for one-mark answers. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
NoteThree-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Write three points from Electrochemistry in your own words; that is enough for a short-answer start. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
NoteThree-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Acidity: phenol > water > alcohol. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
NoteThree-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
Faraday’s laws. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
NoteThree-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
OR
Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
NoteThree-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
OR — marking pointsMix MCQs with short answers so you remember both facts and explanations from Aldehydes, Ketones and Carboxylic Acids. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
OR
If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
NoteThree-mark questions want a short explanation, not a full essay. Link the idea to a figure or an activity.
OR — marking pointsFirst order t½=0.693/k. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
Case-study / source-based · Q29–30 · 4 marks each · 8 marks
(i) Practice.
(ii) Mix MCQs with short answers so you remember both facts and explanations from Alcohols, Phenols and Ethers.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
(i) Electrochemistry.
(ii) Λm and κ.
(iii) Apply it in a school experiment, a labelled diagram, or a situation described in the NCERT chapter.
Case-based items recycle a short story. Pull the fact out first, then apply it. This is original practice in CBSE case style — not a copied board paper.
Long Answer · Q31–33 · 5 marks each · 15 marks
Alcohols, Phenols and Ethers — Alcohols, Phenols and Ethers is an NCERT chapter taught in CBSE Class 12 Chemistry. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
NoteLong answers are marked for structure. Use headings or numbered steps so the examiner can see each part.
OR
Examples — CBSE often tests a concept by asking a daily-life example from the same chapter. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
NoteLong answers are marked for structure. Use headings or numbered steps so the examiner can see each part.
OR — marking pointsChemical Kinetics — Order vs molecularity. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
OR
Accuracy — Use the terms used in the NCERT book; do not replace them with unofficial names. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
NoteLong answers are marked for structure. Use headings or numbered steps so the examiner can see each part.
OR — marking pointsAldehydes, Ketones and Carboxylic Acids — Hell–Volhard–Zelinsky if included. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
*** End of paper ***
No. The layout (sections, question numbers, marks and time) follows the 2025-26 sample paper. The questions are original GKSchools practice.
MCQ, assertion–reason and reading MCQ parts are auto-scored when you submit. Written answers are for self-check against the key.
Download it from CBSE Academic: https://cbseacademic.nic.in/web_material/SQP/ClassXII_2025_26/Chemistry-SQP.pdf
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