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Question No. 21Interactive Test Mode
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Q21. India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th Five-Year Plan. In this context, consider the following statements : 1. Neutrinos are chargeless elementary particles that travel close to the speed of light. 2. Neutrinos are created in nuclear reactions of beta decay. 3. Neutrinos have a negligible, but non-zero mass 4. Trillions of Neutrinos pass through the human body every second. Which of the statements given above are correct?

India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th Five-Year Plan. In this context, consider the following statements :

  1. Neutrinos are chargeless elementary particles that travel close to the speed of light.
  2. Neutrinos are created in nuclear reactions of beta decay.
  3. Neutrinos have a negligible, but non-zero mass
  4. Trillions of Neutrinos pass through the human body every second. Which of the statements given above are correct?
Select the correct option below (or cross out options to eliminate)

Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2010 • Indian Economy

Correct Answer: Option (D) — 1, 2, 3 and 4

Concept & Option Breakdown

Standard Reference Verified

Statement 1 is correct: Neutrinos are neutral leptons with no electric charge that travel at velocities very close to the speed of light.

Statement 2 is correct: Neutrinos (and antineutrinos) are produced during nuclear processes such as beta decay, nuclear fusion in stars, and reactions in nuclear reactors.

Statement 3 is correct: Neutrino oscillation experiments confirmed that neutrinos possess a tiny, non-zero mass.

Statement 4 is correct: Due to their weak interaction with matter and immense abundance from solar fusion, trillions of solar neutrinos pass through each human body every second unhindered.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2010 (Q21)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicIndian Economy → Indian Economic Planning & Growth
Official Answer KeyOption (D) — 1, 2, 3 and 4

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Frequently Asked Questions — UPSC Prelims 2010 Q21

What is the official answer for UPSC Prelims 2010 GS Paper I Question 21 (Indian Economy)?

The official UPSC answer key for this 2010 Indian Economy (Indian Economic Planning & Growth) question is Option (D): "1, 2, 3 and 4". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2010 question belong to?

This question belongs to GS Paper I under the subject "Indian Economy" and micro-topic "Indian Economic Planning & Growth". You can explore all repeated questions from Indian Economic Planning & Growth in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Indian Economic Planning & Growth UPSC Prelims question using option elimination?

To solve Indian Economic Planning & Growth questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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