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GS Paper IUPSC Prelims 2003
Health & Medicine
Question No. 301Interactive Test Mode
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+2-0.66

Q301. Regarding the atom of a chemical element , the magnetic quantum number refers to:

Regarding the atom of a chemical element , the magnetic quantum number refers to:

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2003 • Science and Technology

Correct Answer: Option (A) — Orientation

Concept & Option Breakdown

Standard Reference Verified
  • The magnetic quantum number (m_l) describes the spatial orientation of an orbital relative to a standard coordinate system or magnetic field.
  • The principal quantum number (n) defines the size and energy of the orbital.
  • The azimuthal/orbital angular momentum quantum number (l) defines the three-dimensional shape of the orbital.
  • The spin quantum number (m_s) defines the intrinsic spin orientation of the electron.
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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2003 (Q301)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (A) — Orientation

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Frequently Asked Questions — UPSC Prelims 2003 Q301

What is the official answer for UPSC Prelims 2003 GS Paper I Question 301 (Science and Technology)?

The official UPSC answer key for this 2003 Science and Technology (Health & Medicine) question is Option (A): "Orientation". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2003 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine 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 Health & Medicine UPSC Prelims question using option elimination?

To solve Health & Medicine 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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