Central Board of Secondary Education
Practice Question Paper — not an official CBSE document
Subject Code 086 · Set 1 of 3
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.
Life processes, control, reproduction, heredity, environment · Q1–16 · 30 marks · 30 marks
C. 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.
C. Mix MCQs with short answers so you remember both facts and explanations from Control and Coordination
NoteMix MCQs with short answers so you remember both facts and explanations from Control and Coordination. The other options mix ideas from nearby topics or reverse the textbook fact.
B. Brain parts in outline
NoteBrain parts in outline. The other options mix ideas from nearby topics or reverse the textbook fact.
A. Control and Coordination is an NCERT chapter taught in CBSE Class 10 Science
NoteControl and Coordination is an NCERT chapter taught in CBSE Class 10 Science. 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.
C. 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.
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.
1. Every chapter ends with keywords or a summary that is useful for one-mark answers.
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. Write three points from Control and Coordination in your own words; that is enough for a short-answer start.
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.
OR
1. Neuron: dendrite, axon, synapse.
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.
OR — marking points1. Read the definitions, diagrams and solved examples in the NCERT textbook before practising extra questions.
2. Keep the NCERT wording and add one daily-life example from the same chapter.
Auxin and tropism. 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.
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.
(i) Diagrams.
(ii) If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures.
(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.
OR
Practice — Mix MCQs with short answers so you remember both facts and explanations from Control and Coordination. 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 pointsHow do Organisms Reproduce? — How do Organisms Reproduce? is an NCERT chapter taught in CBSE Class 10 Science. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
Reactions, acids–bases, metals, carbon · Q17–29 · 25 marks · 25 marks
A. A decomposition reaction splits one compound into two or more products, often with heat, light or electricity
NoteA decomposition reaction splits one compound into two or more products, often with heat, light or electricity. The other options mix ideas from nearby topics or reverse the textbook fact.
D. Acids, Bases and Salts is an NCERT chapter taught in CBSE Class 10 Science
NoteAcids, Bases and Salts is an NCERT chapter taught in CBSE Class 10 Science. The other options mix ideas from nearby topics or reverse the textbook fact.
C. 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.
C. 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.
A. In a combination reaction two or more substances join to form a single product
NoteIn a combination reaction two or more substances join to form a single product. The other options mix ideas from nearby topics or reverse the textbook fact.
D. Washing soda, baking soda, plaster of Paris, bleaching powder uses
NoteWashing soda, baking soda, plaster of Paris, bleaching powder uses. The other options mix ideas from nearby topics or reverse the textbook fact.
B. 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.
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.
1. A balanced chemical equation has the same number of atoms of each element on both sides.
2. 2H2 + O2 → 2H2O
Two-mark answers work best as two numbered points. One definition plus one example is usually enough.
Strong acid: HCl; weak: CH3COOH as examples. 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 Acids, Bases and Salts. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
(i) Diagrams.
(ii) If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures.
(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.
OR
Chemical Reactions and Equations — Precipitation reactions. 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 pointsCarbon and its Compounds — Carbon and its Compounds is an NCERT chapter taught in CBSE Class 10 Science. Explain the idea in order (definition → working → result). End with one application from daily life or a numerical/diagram if the chapter has one.
Light, human eye, electricity, magnetism · Q30–39 · 25 marks · 25 marks
A. Hypermetropia: converging lens
NoteHypermetropia: converging lens. The other options mix ideas from nearby topics or reverse the textbook fact.
C. Electric power P = VI = I²R = V²/R
NoteElectric power P = VI = I²R = V²/R. 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.
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.
OR
1. Myopia: diverging lens.
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.
OR — marking points1. Every chapter ends with keywords or a summary that is useful for one-mark answers.
2. Keep the NCERT wording and add one daily-life example from the same chapter.
In parallel, voltage is the same and 1/Rp = 1/R1 + 1/R2 + …. 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 Light – Reflection and Refraction 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.
(i) The Human Eye and the Colourful World.
(ii) Retina has rods and cones.
(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.
OR
Series combination — In series, the same current flows and total resistance is the sum of resistances. 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 pointsDiagrams — If the chapter has a diagram, practise labelling it — many school tests ask for labelled figures. 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/ClassX_2025_26/Science-SQP.pdf
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