Central Board of Secondary Education
Practice Question Paper — not an official CBSE document
Subject Code 086 · Set 2 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
D. Write three points from How do Organisms Reproduce? in your own words; that is enough for a short-answer start
NoteWrite three points from How do Organisms Reproduce? 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.
A. Asexual: fission, budding, fragmentation, spore, vegetative
NoteAsexual: fission, budding, fragmentation, spore, vegetative. The other options mix ideas from nearby topics or reverse the textbook fact.
A. Fertilisation
NoteFertilisation. The other options mix ideas from nearby topics or reverse the textbook fact.
D. 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.
D. 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 How do Organisms Reproduce?
NoteMix MCQs with short answers so you remember both facts and explanations from How do Organisms Reproduce?. The other options mix ideas from nearby topics or reverse the textbook fact.
B. Flower: stamen and pistil
NoteFlower: stamen and pistil. 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. 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. Sexual involves gametes.
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. Reproductive health as in the 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.
OR — marking points1. Write three points from Heredity 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.
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 How do Organisms Reproduce? 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) Asexual.
(ii) Asexual: fission, budding, fragmentation, spore, vegetative.
(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
How do Organisms Reproduce? — Fertilisation. 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.
Reactions, acids–bases, metals, carbon · Q17–29 · 25 marks · 25 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.
A. Combination, decomposition, displacement, double displacement
NoteCombination, decomposition, displacement, double displacement. The other options mix ideas from nearby topics or reverse the textbook fact.
A. Mix MCQs with short answers so you remember both facts and explanations from Acids, Bases and Salts
NoteMix MCQs with short answers so you remember both facts and explanations from Acids, Bases and Salts. The other options mix ideas from nearby topics or reverse the textbook fact.
B. Ionic compounds: high melting point, conduct in molten/aqueous state
NoteIonic compounds: high melting point, conduct in molten/aqueous state. The other options mix ideas from nearby topics or reverse the textbook fact.
A. Carbon and its Compounds is an NCERT chapter taught in CBSE Class 10 Science
NoteCarbon and its Compounds is an NCERT chapter taught in CBSE Class 10 Science. The other options mix ideas from nearby topics or reverse the textbook fact.
D. A chemical equation must be balanced for mass
NoteA chemical equation must be balanced for mass. 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.
1. Soaps are sodium salts of fatty acids; detergents as in remaining text.
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.
A precipitate is an insoluble solid formed in a double-displacement reaction. 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
Write three points from Acids, Bases and Salts 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.
OR — marking pointsA more reactive metal can displace a less reactive metal from its salt solution. Example: Use a situation from the NCERT activity or a labelled diagram in this chapter.
(i) Metals and Non-metals.
(ii) Metals form basic oxides; non-metals acidic or neutral.
(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
Saturated — Saturated: single bonds; unsaturated: double/triple. 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.
Light, human eye, electricity, magnetism · Q30–39 · 25 marks · 25 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.
B. 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.
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. Fleming’s left-hand rule for motors.
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. Light – Reflection and Refraction is an NCERT chapter taught in CBSE Class 10 Science.
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. 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.
CBSE often tests a concept by asking a daily-life example from the same 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.
Parallel: 1/R = 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.
Right-hand thumb rule. 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) Light – Reflection and Refraction.
(ii) Lens formula 1/v − 1/u = 1/f.
(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
Keywords — Every chapter ends with keywords or a summary that is useful for one-mark answers. 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 pointsLight – Reflection and Refraction — Laws of reflection. 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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