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Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] medium exam-ready
The Sun is visible to us about 2 minutes before actual sunrise. This is due to:
  1. A Scattering of sunlight
  2. B Atmospheric refraction
  3. C Dispersion of sunlight
  4. D Reflection from the ionosphere
Generated by claude-sonnet-4-6 · 2026-06-26 01:07 · grounding rag
Model Answer

Answer: B — Atmospheric Refraction

The Sun is visible ~2 minutes before actual sunrise due to atmospheric refraction. The Earth's atmosphere bends sunlight towards the normal, making the Sun appear above the horizon before it actually crosses it.

Explanation

The source passage (Chapter 10, Section 10.5 – Atmospheric Refraction) explicitly states: "The Sun is visible to us about 2 minutes before the actual sunrise…because of atmospheric refraction." Scattering causes the blue sky/red sunset colours, not early visibility — don't confuse the two.

Source: Chapter 10, Section 10.5 – Atmospheric Refraction

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.