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A 20-question CBSE Class 10 Science paper
MCQs · Assertion-Reason · Case Study · HOTS · with answer key.
Sample Question Paper
CBSE · Class 10 · Science — Light: Reflection & Refraction
20 questions40 marks60 minBloom: mixedAnswer key included
Section A — Multiple Choice (8 × 1)
- The image formed by a plane mirror is always:A) Real and inverted B) Virtual and erect C) Real and erect D) Virtual and invertedAnswer: B · Bloom: Remember
- Refractive index of a medium depends on:A) Colour of light B) Nature of medium C) Both A and B D) NoneAnswer: C · Bloom: Understand
- A concave mirror of focal length 15 cm forms an image at 30 cm. The object distance is:A) 10 cm B) 15 cm C) 30 cm D) 45 cmAnswer: C · Bloom: Apply
Section B — Assertion & Reason (4 × 2)
- Assertion: Light bends when it passes from air into glass.
Reason: The speed of light changes when it enters a denser medium.Answer: Both A and R are true, and R correctly explains A. · Bloom: Analyse
Section C — Case Study (2 × 4)
A student uses a convex lens of focal length 20 cm to project the image of a candle on a screen. When the candle is placed 30 cm away, a sharp image is formed on the screen.
- Where is the image formed? (v = 60 cm, on the other side)
- What is the nature and magnification of the image? (Real, inverted, m = −2)
Section D — HOTS (6 × 3)
- Why do we see a rainbow only after rainfall? Explain using dispersion and total internal reflection.Model answer + 3-mark rubric included in full export.
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